Shen Yan, a top criminal psychologist, is trapped in a seven-day cycle where his apprentice dies tragically. In order to save the young detective who always calls him "teacher", he must use the scalpel of psychology to cut through the illusion of a perfect murder case in the memory maze that is reset every time. When the murderer smiled at him in every cycle, Shen Yan realized that the only key to breaking the deadlock was a fatal misjudgment he had made. This is a dangerous game in which time and memory are used in exchange for the possibility of "rescuing you".
