Xiao Xi enters Lin Wendong's home as a nanny, seemingly attentive and sensible, but in reality, she aims to uncover the truth behind her sister Jiang Nan's death. Jiang Nan was allegedly coerced to death by Lin Wendong and his wife Han Xue, with her suicide then faked. Lin Wendong and Han Xue have been estranged for years, their marriage long broken. Xiao Xi's presence not only intensifies their conflict but also allows her to secretly gather evidence. Can Xiao Xi's revenge plan succeed? Are there deeper secrets hidden behind Lin Wendong and Han Xue?
