Under the urban undercurrent, six members with different backgrounds formed a private reasoning team with different expertise to help solve the unsolved cases of the police. As the team members grow up and hide their secrets, they are involved in the shadow of a series of long-standing unsolved cases. Behind every case lies deeper social disorder and rifts in human nature. Under the multiple tests of truth and morality, team and individual, reality and ideal, how do they support each other and face the undercurrent in their hearts?
