Suspense writer Lin Shen accidentally found an ancient mirror from the Republic of China, and a stranger's death notice appeared in the mirror - the manner and date of death of the deceased were clearly visible in the mirror. What's even weirder is that every time he cracks a death, he loses a memory of his mother. As the seven-day countdown starts, the scene in the mirror gradually points to himself, and Lin Shen must choose between "saving others" and "protecting memory." (Not harem, not routine, not invincible, not systematic, not brainless, not Shuangwen)