Liang Ke, a doctor of criminal psychology, returns to his hometown to find his old love, but his plan completely changes when a plaid dress appears at the crime scene.
As the case was further investigated, Liang Ke began to use unscrupulous means to kidnap, force confessions, and fake death. When he thought he was getting closer to his girlfriend who had disappeared for many years, he did not know that he had stepped into a bigger situation.
When his old love stood in front of him again, Liang Ke realized that he was the stupidest one among them all.