After reading Apostle Walker's imaginative essay, the battle between black and white, and the gray area between black and white, there is also warmth.
Sun Ao is an undercover police force, and Zhou Cheng is the boss. Black and white are intertwined into gray.
In the gray area, what is the truth?
Zhou Cheng, the eldest brother who is cynical on the surface but innocent on the inside: I don't want to kill you, I can't bear to do it.
Sun Ao, a double-faced undercover agent who looks serious on the outside but is sullen on the inside: I must kill you, and I... I can't bear to do it.
Concept: The world is not black and white, I love you but I have to kill you.