Lin Zhiwei died in a seemingly perfect murder. Only a bloody knife and a fingerprint - Gu Jianshu's - were left at the scene. As the captain of the criminal investigation, he personally pushed himself to the trial seat, but no one knew that he was supposed to kill the real murderer that night, but he misjudged the target. When all the evidence pointed to his cold-blooded murder of his wife, an unsent letter appeared among Lin Zhiwei's belongings: "Don't believe what you see." He began to track down the seven people she last came into contact with during her lifetime, and each clue was like a carefully designed trap, leading him into deeper darkness. The truth is not who killed her, but that she knew she would be killed, and he was the one she chose to take the blame.
