A serial murder case occurred in Guyan City, and each of the deceased had hand rust marks on their collarbones. Tao Ying, a target of the criminal police team, was recalled during her vacation to track down the serial murderer. Several new police officers came in during the vacation. Among them, Luo Yuxuan, like Tao Ying, is a highly intelligent person, but as the story progresses, the gap between the two becomes wider and wider, but the two still have a budding relationship. The two work together to solve the case, but at the end of the case, the murderer turns out to be the astonishing her... But is this really the truth? No, everything is just...
Intention: Some things just happened, and they cannot be changed no matter what.