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An adept psychologist goes toe-to-toe with a particularly difficult patient in this mystery thriller from director Leste Chen. Xu Ruining (Zheng Xu) has begun to receive acclaim for his workin the field of mental health, but he is challenged by a mercurial patient named Ren (Karen Mok). Over the course of their session, Xu realizes that Ren is far from the demure patient she appears to be.