Criminal investigation consultant Shen Yanci (cold and sensitive) infiltrated the police station to investigate the cause of his brother's death, but he was forced to partner with the iron-blooded criminal police captain Lu Lin (a hot-tempered guard) because of a "no body case". One uses data to weave a maze, and the other uses intuition to crush evil. When the layers of old cases were peeled away, they discovered that each other was trapped beasts, and the truth was far more deadly than the abyss.
