"The Chamber of Secrets has been opened. Enemies of the Heir, beware."
The words blazed on the third-floor corridor wall, blood-red and gleaming in the torchlight. Every student who saw them stopped.
It was after the Hallowe'en feast. Draco and the other Slytherins were filing out of the Great Hall, still warm from the evening, when they found themselves stopping with the rest of the crowd. Mrs. Norris hung rigid from the bracket of a torch—tail stiff, eyes wide and glassy, body absolutely motionless.
Petrified. Exactly as Draco remembered.
Harry, Hermione, and Ron stood in the middle of the corridor, facing the cat. The crowd had formed a wide ring around them, instinctively keeping clear.
Hermione had gone white.
Draco pushed forward, trying to get close enough to catch her eye, but Blaise grabbed his arm. "What are you doing? Don't go anywhere near them. Look at Filch's face—stay out of it."
Filch arrived at a run. The sight of Mrs. Norris stopped him entirely. When he found his voice again, he directed it at Harry, in a tone that left little room for doubt about where he had already assigned blame.
He didn't get far. Professor Dumbledore arrived within minutes, took in the scene, and guided the three of them—Harry, Hermione, Ron—quietly away toward his office.
Draco did not follow. He had no particular desire to come to Dumbledore's attention this evening.
Facing Dumbledore was never straightforward. The old man was sharper than almost anyone Draco had ever encountered, and the weight of what he knew about him—what he had witnessed in another life—made every interaction complicated in ways he couldn't easily explain. He had spent the past year keeping a polite distance. This was not the night to close it.
He let Blaise pull him along with the rest of the Slytherins, and said nothing.
"What's the matter with you?" Blaise said when they were back in the common room. "You were halfway across the corridor before I stopped you. That's not like you at all."
"I'm thinking," Draco said.
He took the armchair by the fireplace and stared at the flames. Around him, the common room was buzzing.
"The Heir's Chamber," he said, half to himself.
"Obviously a prank," Blaise said, dropping into the chair opposite him. "Someone with a flair for drama. Potter, probably—he's been pulling stunts all year."
"Harry Potter didn't do this," Draco said. "He grew up in the Muggle world, with Muggles. How would he know about the legend of the Heir of Slytherin?"
Blaise paused, considering this.
Not far away, Theodore Nott looked up briefly from his book.
"So—what, you think the Chamber is real?" Blaise said.
"I think pretending it isn't is a mistake."
Pansy had appeared from somewhere during this exchange, having helped herself to Crabbe's bag of nut brittle and settled into a nearby chair. "If the Chamber's real, Dumbledore would have found it years ago," she said dismissively. "The castle's been renovated since Slytherin's time anyway. They probably cleared it out."
They hadn't. That much, at least, Draco was certain of—Helena Ravenclaw had told him so. But he said nothing.
"The real question," he said quietly, more to himself than to the room, "is how something large enough to Petrify a cat moves through this castle without anyone seeing it."
Nobody heard him. Blaise and Pansy had moved on to debating whether the Weasley twins were technically capable of something so elaborate, and Crabbe was staring mournfully at his confiscated nut brittle.
Draco stared at the fire and thought.
In another life, the incidents had mounted gradually over the year—a cat, then students, then the school in panic, then Hagrid taken to Azkaban and Dumbledore removed from the headmaster's chair. Harry and Ron had eventually gone into the Chamber themselves. They had come out. Ginny Weasley had survived. Lockhart had not survived with his memory intact.
He had paid very little attention to the details at the time. He had been twelve, and smug, and far more interested in watching Potter squirm than in understanding what was actually happening.
He regretted that now.
What he knew: the monster was a basilisk. The Chamber was somewhere in the castle. Helena Ravenclaw had told him it existed but could not tell him where. He had spent the holidays brewing a precautionary stock of Mandrake Restorative Draught, which gave him something, at least.
What he didn't know: the location of the Chamber, the precise method by which the basilisk moved, and who this year would open it.
That last question was the most pressing one.
---
The days after Hallowe'en were full of exactly the kind of rumour and speculation Draco had expected. Students clustered in corridors, whispering. Even the portraits had opinions. At dinner one evening, Draco caught Nearly Headless Nick across the hall, holding forth loudly to the Fat Friar.
"That was no second-year's spellwork—Dumbledore was quite explicit on that point. Advanced Dark magic. Extremely advanced."
Filch, meanwhile, had become erratic. He haunted the third-floor corridor where Mrs. Norris had been found, sometimes scrubbing at the wall with various cleaning agents, unable to accept that the words wouldn't come off. He watched Harry in the corridors with a particular fixity of expression.
"Poor man," Hermione said one afternoon in the private study, turning pages without reading them. "He clearly loves that cat."
"Being a victim doesn't change his character," Draco said. "He put Crabbe and Goyle in detention this morning because he claimed they were breathing too loudly."
Hermione's mouth twitched. "He gave the Weasley twins detention yesterday for 'excessive corridor levity.'"
"He's unravelling." Draco watched her. Something had been on her mind since Hallowe'en—she had been here every day since, working through things, but she wasn't sharing any of it, and that was unusual. "What exactly happened that night? Why weren't you in the Great Hall at the start of the feast?"
Hermione turned a page. "We went to Nearly Headless Nick's Deathday party first. In the dungeons. Harry was invited."
"That accounts for Nick's enthusiasm in clearing Harry's name," Draco said. "But it doesn't explain how you ended up on the third floor."
"We were coming back up to the Great Hall. There wasn't anything to eat at the Deathday party."
"And?"
Hermione hesitated. "Harry said—" She stopped. "I think he may have been lightheaded from hunger."
"Hermione."
"It was nothing. Can we talk about something else?"
She knew something. The hesitation had a specific shape—not ignorance, but deliberate omission. Draco looked at her for a moment, then decided to let it go. For now.
"Since you're researching the Chamber," he said instead, "you could ask Professor Binns directly. If anything in this castle happened before 1900, he was probably there."
Hermione's eyes narrowed slightly. She had caught the deflection and filed it away—he could see it on her face. But she accepted the suggestion.
"Every copy of Hogwarts: A History is out on loan," she said. "The waiting list is two weeks."
"That's the Chamber of Secrets effect. Everyone wants to know."
"Do you know something about it?" She was watching him in the particular way that meant she had already formed a hypothesis and was checking it against his reaction.
"I know it's a legend associated with the school's founding," he said, which was true. "I know Salazar Slytherin is supposed to have built it. Beyond that—" He shrugged. "Go and ask Binns."
---
She did. The following History of Magic lesson, Hermione raised her hand at the beginning of class and, with a patience and precision that left Professor Binns momentarily disoriented, asked him to speak about the Chamber of Secrets.
What followed was unprecedented: an entire class of students listening with genuine attention to a Binns lecture. Eyes open. Quills moving. Even the students who normally used History of Magic as a recovery period were sitting upright.
Draco, who already knew most of what Binns said, watched this phenomenon with quiet amusement.
He was less amused by what came after.
Filing out of class, Draco found himself behind Harry, Ron, and Hermione in the corridor. The crowd pressed them close.
"—Slytherin was just a paranoid old bigot," Ron was saying, with the uninhibited confidence of someone who hasn't yet noticed a Slytherin directly behind him. "Can't imagine wanting anything to do with his lot—"
Hermione was nodding.
Draco walked past them without a word or a glance, and kept walking.
It wasn't the words themselves. He had heard worse. It was the nodding.
He was in the private study that afternoon, working through Herpo's notes with rather less concentration than usual, when Hermione arrived.
She sat down across from him and opened a book and said nothing.
He said nothing.
After a while, she said, without looking up: "You heard us in the corridor."
"Yes."
"Ron was talking generally. He didn't mean you specifically."
"I know." Draco kept his eyes on the parchment. "It doesn't matter."
It did matter. Not because of Weasley—Weasley's opinions were precisely as predictable as he had always found them—but because she had been nodding along. After everything.
He understood, rationally, that the Chamber opening had complicated things for everyone named Slytherin. He understood that the connection to the Heir of Slytherin was going to make people look at his House with suspicion, and that he could not fully blame them for it. He had known this was coming.
It didn't make the nodding easier to sit with.
"I found out who Herpo the Foul was," Hermione said, into the silence.
"I know. You told me already."
"I've been thinking about it since then. The basilisk. The Chamber. The timeline." She paused. "The Heir of Slytherin is supposed to be the only person who can open the Chamber. A Parselmouth."
"Binns covered that."
"I know." She wasn't looking at him. Her finger was tracing the edge of the page without reading it. "Draco, why were you studying Herpo's notes?"
"I've explained that."
"You said you wanted to understand dark magic, not practise it." She looked up. Her expression was careful in a way that told him she had spent some time deciding how to say this. "I'm trying to give you the benefit of the doubt. I'd like to keep doing that. But I need to understand what you're actually doing, because the alternative—the conclusions I'd draw from the evidence, if I were being logical about it—"
"The conclusion would be wrong," Draco said quietly.
"Then tell me something true."
He looked at her across the desk. The fire threw light across her face. She was watching him in that way she had—focused, trying to be fair, clearly already half-convinced of something she didn't want to be convinced of.
He thought about what he could tell her. What would help and what would complicate things further. What was too much and what was not enough.
"I know about Horcruxes," he said finally. "Not because I'm trying to make one. Because I need to understand how to destroy one."
Hermione went very still.
"The basilisk in the Chamber is relevant to that," he continued. "That's why I was interested in Herpo's notes. That's why I've been studying the Chamber. Not to open it. To find what's inside."
She stared at him. "You're telling me you believe the Chamber is real."
"I know it is."
"And that there's a Horcrux at Hogwarts."
"Yes."
Hermione sat with this for a moment. Then: "Whose?"
He held her gaze. "You know whose."
The firelight moved across her face. He watched her work through it—all of it, the notes, the basilisk, Herpo, the Horcruxes, the year in which they were living—and he watched her arrive at the same answer he had.
"That's why you went to the Forbidden Forest," she said, quietly. "That's why you knew what was on the back of Quirrell's head."
He said nothing.
"You've known about this since first year."
"Yes."
She looked at him for a long moment.
"And you didn't tell me," she said. Not as an accusation. More like someone checking a calculation.
"I didn't want to put you in danger."
"I was already in the Forbidden Forest," she said, with a faintness he thought might be the early stages of exasperation.
"I know."
Hermione closed the book in front of her. She put both hands flat on the desk, looked at them, and said nothing for a little while.
"All right," she said finally. "Tell me what you actually know. All of it. And this time, don't leave anything out."
Draco looked at her—at the firm set of her jaw, the slight tension around her eyes, the expression of someone who is frightened but has already decided to be brave anyway.
"This is going to take a while," he said.
"I have time," she said.