Su Qingzhi, the legitimate daughter of a prominent Jiangnan family, encounters a framed family disaster, conceals her identity to become a maid in the Gu Mansion, and secretly searches for the ledger that will clear their name. Gu Yanheng, her former betrothed, has long recognized her identity and silently protects her from the shadows. With storms rising within the mansion and villains continuously setting traps, Su Qingzhi navigates them with wisdom, unites allies such as Chen Momo and Liu Wan, adheres to the creed of "not using resentment as a blade," gathers human and physical evidence, takes the righteous path to uncover the aged injustice, finally restores the Su family's innocence, and inherits the orchid-cultivating craft.