Synopsis：Veteran detective 顾老九 receives orders from his superiors to set up 无忧事务所 with 文楠 and 方小米 as a cover to investigate the counterfeit currency case. On the surface, 无忧事务所 helps clients resolve worries and daily trivialities, but in reality it seeks to get close to 万家, the center of the counterfeit case. 万家 is highly wary of the police. Since 万董事长 is bedridden, a series of inheritance disputes have erupted; the heirs of 万家 have died one after another, and the entire company is riddled with anxiety. As members of 无忧事务所 gradually infiltrate, they discover that everyone in 万家 harbors secrets. The crisis escalates further, and a direct confrontation between 无忧事务所, which assists the police, and the 万家 criminal gang is on the verge of breaking out...