Xu Xiulian, a dismissed medical graduate student, was born with a disease - the pupil of his right eye will turn golden when he is emotional, which is medically called "heterochromia". In fact, this is his ancestral "causal eye" golden finger, which can see the "desire lines" and "knots of fate" on others. But this ability has a fatal flaw: every time it is used, it must meet a yandere-like extreme condition, such as staring into the opponent's eyes and smiling for ten seconds, or cutting one's own finger with a knife to activate it.
His only relative, his sister Xu Ling, disappeared in a mysterious fire. The only clue left at the scene was a strange white lotus. In order to find out the truth, Xu Xiulian returned to the urban village where she grew up and opened a psychological clinic that "cures all kinds of crazy thoughts". On the surface, she treats people with mental illness, but secretly specializes in treating all kinds of disobedient monsters and monsters. It turns out that the first patient is Bai Susu, the most famous "professional mistress" in the area - a socialite who has stolen countless men with her beauty, but always disappears mysteriously after succeeding. During the treatment, Xu Xiulian accidentally discovered that Bai Susu had a black "knot of fate" wrapped around her body, which was related to her missing sister.
He began to investigate, only to find that a white shadow appeared on the rooftop of the village in the city every night, specifically targeting men who had betrayed women. Mistress, White Lotus, Missing Sister, Rooftop Wind Shadow - everything points to a strange organization hidden underground in the village in the city. What Xu Xiulian didn't know was that every time he used the "Causal Eye", the close-up of the golden smile in his right eye had been secretly captured with a camera by a mysterious person hiding in the dark...
