Xiao Yi, a back rub worker at the big bathhouse in the south of the city, is not the best at rubbing his back, but speaking nonsense to people and ghosts. One night when he was on duty, he accidentally heard the secrets of Yasushi's agent and the incense master of the Kuroshio Club at the same time. That night, he was bagged by both sides and forced to work as an undercover agent for the opposite party. What's even more outrageous is that he is also bound to the "undercover performance system" - government tasks must be done, and gang tasks must also be handed in. If the satisfaction level of either side falls below the passing line, he will immediately be struck by lightning and vomit blood. Secretly sealing letters, exchanging account books, playing tricks, delivering false information, accompanying his superiors to catch moles, and taking the blame for his enemies, Xiao Yi relies on his mouth and crooked brains to repeatedly jump between the two sides, and the more he mixes up, the more he looks like a henchman. But when he followed the system rewards and discovered a series of murder cases, he discovered that the real manipulator of the situation was not Jingyesi or the Kuroshio Club, but the "Mr. Finisher" Song Wuxiao who was hiding behind both parties - an accomplice who specialized in doing dirty work for the dead master. When everyone thought Xiao Yi was just a cunning undercover agent, he was ready to sell the entire bureau to everyone.
