A combat instructor of a special forces unit returns to the city full of temptation and desire, but he can only condescend to massage women in a beauty salon. Even his humble residence will not be protected. How can he still be depressed and allow himself to be a mermaid? Jinling is not a thing in the pool. He has powerful and amazing fighting skills, and is proficient in the ability of latent assassin and detection. Under the opportunity of catching a thief, he regains his self-confidence and his life goal.