Many years ago, Jiang Lin's father, Jiang Hai, unfortunately died while performing an undercover mission. Various signs indicated that there was a mole in Jiang Hai's special operations team. Time passed, and Jiang Lin also became a policeman, but the road to finding the truth was thorny until he met Fei Yu. Together, the teenagers search for the truth in the endless darkness, the battle between black and white, the departure of the girl reveals the corner of sin, all the courage in life is used in helpless efforts to break away, the darkest area is the brightest beginning.
Concept: Detective suspense reasoning