A deadly investigation that ventures into the depths of emotion, and a journey of self-redemption intertwined with technology.
Chen Chen, the police team's "emotional profiler," uses the mysterious "Heart Mirror" System to enter the final emotional scenes of the dead and uncover clues. Every foray is a dance with death. Empathy blurs the lines, his personality splinters, and extreme emotions may permanently "contaminate" him. This gives rise to his second personality, "Mirror": rational, violent, and obsessively possessive of his only source of light, forensic pathologist Wang Xiaolin.
Wang Xiaolin puts reason above all else and serves as his anchor to reality. Their relationship grows amid clashes between life and death and their efforts to save each other. Their intimacy is their only comfort in despair.
Captain Zhang Jiawei is their staunchest ally, using his experience and influence to provide them with shelter.
As one bizarre case after another unfolds, the clues point to the top-secret overseas "Project Inner Voice." Chen Chen must choose between succumbing to the abyss and saving others. He is a mirror peering into the abyss, and the abyss itself.