In their past lives, the Yan family's true and fake heiresses, Yan Jiaojiao and Yan Bing, were framed and killed by the book-transmigrator Jiang Ning and the fake young master Lu Yi'an. Awakening once more, the sisters join forces to expose Jiang Ning's framing, resolve misunderstandings with their mother, and annul the engagement with Lu Yi'an. They track down their lost third brother, Yan Han, help their second brother, Yan Che, break free from a green tea person, and assist their eldest brother, Yan Cheng, in successfully developing an anti-epidemic medicine. Sister Yan Bing, concealing multiple identities such as an antique appraiser and a doctor, repeatedly foils the villains' schemes, while sister Yan Jiaojiao acts as the family's adhesive. Facing Jiang Ning's transmigrator advantage and Lu Yi'an's rebirth ambition, the sisters plot step by step, ultimately punishing all the villains and safeguarding the Yan family's reunion.