{Shen Yan} is a well-known elegant young man in the capital, but he hides the "Yin Yang Card" that can ward off evil spirits. His fiancee, the Su family, suddenly broke off their engagement, claiming that she was "haunted by evil spirits and fearing harm to the family." When he was investigating, he was involved in a series of supernatural murders. Mysterious cards are left at the crime scene, and behind the scenes are the power-hungry Duke and his jealous aristocratic family members. What's even more bizarre is that every time he is in danger, there is always a mysterious woman who comes to help. She seems to be both good and evil, but she gradually makes Shen Yan fall in love. The secrets of cards are revealed, murder cases are pursued, and good and evil are entangled. Shen Yan holds the cards and unravels the conspiracy in the fog, only to discover that the divorce, the murder case, and the woman's identity all hide shocking secrets.
