Waking with a start at midnight, Shen Yan sees someone standing beside his bed who looks exactly like him, wearing the same pajamas but with eyes as cold as a corpse's. The stranger says softly, “You've been living too hard. It's my turn now.” He thinks it must be a dream, but the next day, a text appears on his phone, one he never sent: “Don't trust anyone, including yourself.” As the “other me” starts taking over his life, his job, his lover, even his memories, Shen Yan finally understands: this isn't a double. It's the self he's suppressed for twenty years, finally awake, and it wants to devour him completely. As reality begins to crumble, he must discover what he has forgotten before he is replaced...