After ten years of chasing the murderer, the murderer is me - this is the last sentence Chen Jin wrote in his diary. The former criminal police captain became the number one suspect. Psychology expert Lin Zhao was ordered to trace the truth, but step by step he stepped into the memory maze created by him. The silence of the forensic doctor, the lies of the survivors, the revenge of the informant, and the conspiracy of the boss, every piece of the puzzle points to him and to the conclusion that she is unwilling to admit: perhaps, they are accomplices in the same nightmare.