Zhang Xueping, a young man with a mysterious past, was raised in a gang and brainwashed into a loyal follower. He has little memory of his own life before joining the gang and struggles with emotions. After a traumatic event involving the death of his father's enemy, he is tasked with protecting the boss's child. He is now emotionally detached and follows orders without question. He is now tasked with protecting the boss's child in a secluded cabin.