The central Suburban Park, one looks beautiful girl killed. Abdomen body in a knife, but his clothes clean and abnormal. Then there are many women in the city from a series of killings, the girls were killed when the victim was dressed as a sexy doll dress. A jittery time A city. Boy genius Li Yuan because in the TV interview, to determine the psychological side of the suspect and the motive for the crime and murder has written. The suspect held at the beginning of his sister yuan, although Li Yuan took great pains in the cracked, suspects involved in the problem, but was not the sister rescued from the snare, and the murderer had escaped. Three years later, a city and the outbreak of murder, this time all the heavy fog, murder in the pool, only suspect suspect full three years doll before the murder case, but behind the intricate clues, hidden in the end what startled day secret? Genius yuan theory and how to crack the case, find the real killer.