Xie Li is an undercover agent. He just wants to hold Chang Xiaojia accountable for his sins. As an undercover agent, Xie Li is sent to Fish Island Prison with the mission to get intel on Chang Guanshan, the leader of the biggest illegal organization in the coastal city, Hong Fang, through his son, Chang Xiaojia. It is rumored that Chang Xiaojia was imprisoned for an alleged involvement in the rape/murder of a female police officer.  He has a strange and stubborn personality and is not as easy to approach as Xie Li initially imagined. However, at this moment, Chang Xiaojia starts showing an unusual interest in Xie Li’s body. The main couple is Xie Li x Chang Xiaojia, with a plot that may potentially involve drama and intense scenes. There might be some plot twists and misunderstandings, with the background setting being fictional. The inspiration for this story comes from “Line Walker 4,” borrowing some character concepts but not entirely derived from it. The characters’ personalities are different. Please refrain from associating real actors with the characters since the author does not have specific visual images while writing; they are simply drawn to the background setup. The story is expected to be relatively short and it will have a happy ending.