In the shadow of the bustling city, two men with intertwined destinies - the cold-blooded criminal police captain Gu Chen and the mysterious criminal psychology expert Lu Li - are forced to cooperate because of a serial murder case. Gu Chen firmly believes in justice and rules, while Lu Li walks on the edge of morality and desire. The two have very different personalities, but in the process of tracing the truth, they gradually discover that each other's fate has been entangled many years ago.
As the case deepens, they uncover a secret organization that has been hidden for many years, and the identities of Gu Chen and Lu Li are not as simple as they appear. One is the guardian in the light, and the other is the peeper in the darkness. Their opposition and resonance are like twin flames, devouring each other and illuminating each other.
In this game between justice and evil, can they find the real answer? Can they find the ultimate redemption in each other's trust and betrayal?
Concept: Hope and redemption still exist in the darkness