At Old Mrs. Su's birthday banquet, Miss Lin occasionally overheard Su Chengji's conversation with a servant and learned that Old Mrs. Su wanted to arrange for the Second Miss Lin to marry Su Chengmin.
Seizing the opportunity, she pretended to be unwell. Mrs. Lin, who always treated the concubine-born daughter as her own, let her biological daughter, the Second Miss Lin, accompany her sister.
In an empty room, Miss Lin dismissed her sister's maid and, together with her own maid, colluded with the maid by Old Mrs. Su's side to drug the Second Miss Lin's tea.
Man Er, who was sneaking around Su Mansion behind the adults' backs, discovered the unconscious Second Miss Lin in the pavilion and hurried back to call for help, running into Su Qing.
Su Qing, a former official's daughter, immediately realized that the Second Miss Lin had been drugged when she saw her.
So she helped the Second Miss Lin out and instructed Man Er to find Mrs. Min.
