Xu Mingtang, the eldest daughter of Duke Anguo, refused to marry Xiao Chengji, the eldest son of Prince Zhenbei, in order to save her sweetheart, forcing her younger sister to take her place. Unexpectedly, the sedan chair was carried in the wrong direction. Xu Jin, the lame and down-and-out prince who was regarded as a mad dog by the whole capital, had red eyes and blood all over her body when she lifted her hijab: "Are you here to kill me?" Xu Mingtang discovered that he had a golden finger to spy on the future - every time he came into contact, he could see the horrific scene of this villain going dark and massacring the world. In order to save herself, she could only put on a gentle and virtuous mask and get closer to this lone wolf on the verge of losing control. It's just that Xu Jin is deeply suspicious, uncertain, and often goes crazy and tries. However, Xu Mingtang gradually discovered that this man, who was said to be violent and bloodthirsty, actually hid a shocking secret about her life experience behind his actions. When the truth of the blackening is completely revealed and Xu Jin's blade is close at hand, is she his prey, or is she the only weakness he has never dared to touch?