Yang Chengran was forced to get involved in the "family will anomaly" revealed by Han Qingqing. Behind an engagement that seemed to pave the way for family love, there were fake certificates, stand-ins and serial disguises. Every time the truth approaches, a layer of masks is changed within the family; and Yang Chengran discovers that he is the one who was designed to be a key witness. Solving the case, fighting for the family, exchanging identities and chasing the murderer are intertwined, until the last will reveals the name of the real murderer.
