The two weeks to the Halloween was spent with laughter and happiness in the Potter Cottage. James had told her about an escape plan that made sure that all three of them would survive and at first she was skeptical about it but after he told her that he had done some rescue operations as an Auror and as a soldier in his first life.
James was happy that she was taking his past life memories in a stride as she had those memories when she was a child but that shaped her into who she is. She told him that her drive for knowledge and research came from her past memories as she was a researcher in her past life and she wanted to research all about magic and it's technicalities.
James was also happy that he was not the only one with that secret but still both of them made a vow to each other stating that both of them will keep their secrets and they will not tell anyone about it, not even to their friends, unless they also have their past life memories.
Their plan was a simple one, they bought a new flat that was in the suburban are of London and transferred all things in their Cottage and left the duplicates of them in the Cottage.
Sirius was in on the escape plan too and James had informed him that if he hear that were dead, he needed to check the flat in the London first and foremost.
At first Sirius was confused about why James was making an escape plan like this but agreed nonetheless. He didn't question his best mate, he knew that James will tell him everything when it's over so he bided his time.
Their plan for making Sirius the decoy was also a success as Sirius told everyone that came to pub that he frequently visited, that he was the secret keeper of the Potter's, but they also informed four people the truth with a written statement from James and Lily. Albus Dumbledore the Headmaster of Hogwarts, Amelia Bones the Head Auror, Bartemius Crouch the Head of DLME and Millicent Bangold the Minister For Magic. The information was passed to the four them directly by James after making sure that there no eavesdropping charms near them.
That all happened in the first week after the Fidelius Charm, from the second week onwards, Sirius was staying with them in the cottage. He helped the couple with Harry and made sure that Harry was entertained and stayed away from the entertainment of his parents.
On October 30th, Peter came to the cottage and checked upon them and that day Sirius had went out to be entertained as he was getting jealous over James and Lily. Peter stayed for the night and on 31st, he left the cottage with tension filled body. He didn't know what but something was nagging in his mind, but for the life of he couldn't figure it out.
October 31st, evening, James and Lily were playing with Harry in the visiting room when James felt the wards informing him about an unknown guest and he also sensed the seal he left on Peter nearing them. Sighing, James kissed Lily and Harry on his forehead and told Lily as he held her close and told her in a whisper "Don't worry."
Next thing Lily knew was that she and Harry was in their flat in London and that James have apparated them to the flat without any sound and he disapparated again and Lily was stumped realising that her husband had gone back to their cottage to face that madman and she felt sorry for Peter, as she was sure that he was tortured to insanity after that monster got their secret. Right then, Harry started to fuss and she diverted her mind from her husband to her son so that she could keep her mind busy with Harry.
Back at the cottage, James reappeared in the play room and went down stairs, he saw Voldemort outside their cottage and screamed at the top of his lungs "LILY! IT'S HIM! TAKE HARRY AND GO! I'LL HOLD HIM BACK!"
James saw the maniacal grin on Voldemort's face and waited for the right time to destroy the maniac that is hunting his son because of a prophecy. With one hand on his wasnd, that had become almost redundant in his hands because of the memories of his past life, the other on his chest holding a rat near his chest.
Voldemort blasted opened the door and trailed his wand at James and said silkly "Avada Kedavra"
The sickly green spell shot from Voldemort's wand and impacted on James chest and he fell down like his puppet that lost its string. Voldemort relished in the murder that he just committed and went upstairs past James. As he reached the play room that Peter had informed him, he blasted the door apart and entered it only to find it empty. He was baffled at the empty room at first and his anger rose to new heights. As he was about to raise his wand to destroy the room itself, he noticed that his legs were chained to the floor and his arms were chained to the walls. Before he could understand what was happening he heard the voice of the man he had just killed from behind him "Yippee Kai Yay Motherfucker!"
Then Voldemort felt some kind of impact on his back and at first he was smug about knowing nothing physical will hurt him thanks to the dark rituals that he had conducted, but that smugness went away swiftly as his inside started to swirling and his abdomen exploded. He screamed in pain and knelt down on the floor with his face looking upwards. He hadn't felt this much pain in his life ever and when he thought that it was over, James Potter held his face and opened his mouth. Voldemort didn't know what James was up to but he saw a small swirling mass of magic in James's left hand with multiple fire rings around it.
Looking into the eyes of the maniac who was after his son, James said "Know this Voldemort, I made this magic specifically to end you. And even if you survive this, I promise you that if you ever went after my son or any other child, I'll be there to hunt you down."
Without further ado, James pushed the swirling mass of magic in Voldemort's mouth and erected a shield in front of him. Just as the shield was fully formed, Voldemort imploded into himself at first and then in one swell swoop, he exploded into tiny pieces with fire consuming all the pieces leaving behind only ash and the wand.
Janes did see one shadow move towards the stage plush toy of his son and another leaving the cottage for good. After he was sure that the main spirit left the cottage, James picked up toy and started to write the sealing formula he knows with his blood. When he finished writing the seal, he pocketed it and waited in the room.
A few seconds later, Peter came into the room but as soon as he saw James alive and well, he tried to run away, but James was faster than him he was in front of Peter within second. Without any warning James sucker punched him and Peter fell down unconscious. Again, James used power sealing seal on Peter and transfigured him into rat toy. Sighing to himself at the wand less performance he displayed he mulled over his thoughts and came to a conclusion 'Thanks to Minato's powers I have total control over my magic, thanks to that I don't need a wand nor do I need hand signs to perform magic or any jutsu I know. And also, my power had risen to ne heights today, if my theory is correct then my two cores of magic and chakra had combined today thanks to Veil being so thin.'
As he was musing, he heard the sound of footsteps, as he sensed the magic around the cottage, James knew that it was Hagrid, so James went back to the flat where he had left his family.
He was surprised to find Sirius in the flat and when Sirius saw James he hugged him with everything he got and said in a muffled voice "I thought something was not right when I couldn't find Peter so I came here first knowing that you told me to come here first." Releasing James from his hug and hold him on his shoulders Sirius asked "Tell me the truth now! Why did you need this escape plan?"
Scowling for bit, James told him the truth that James wanted Sirius to know "Peter led Voldemort to the cottage to kill Harry. I finished Voldemort and this is Peter right now."
Sirius paled at the news of Peter betraying him and gaped when he heard Voldemort was dead. Shaking his head, he asked James "What do you mean that Voldemort is dead?"
Shrugging his shoulder, James replied in a calm manner "Voldemort tried to kill me, I faked being dead and he went to the play room where Harry would have been. So I silently followed him and blew him up to several pieces and burned his body to ashes."
Sirius looked at James with open mouth and James saw Lily standing few feet away from the with the same expression as Sirius, but she was the first one to came out her surprise and asksd James in Los voice "He won't be coming after our baby right? He won't be after Harry now, would he?"
Smiling at her, James shook his head and said "He's dead and I had promised him that even if he survived this, I'll hunt him down if he hurt another child in any form."
Hearing that Sirius barked out a laugh and was in full blown laughter that he fell to the floor and curled up while laughing. James just shook his head and wnet to his wife to capture her lips with his. Looking into those green eyes James told her "No matter what happens, I'll protect our family from everything that will try to harm our family. I'll promise you that."
"Thank you for loving us." With a watery smile and tear in her eyes, she snogged him to silly.