Yun Jia, a small theater actor who values love and justice, is poor-tongued and warm-hearted. He was mistaken for a police undercover due to an error in an audition, and accidentally infiltrated into the largest gang of gangsters in the local area. He wanted to clarify his identity, but unexpectedly discovered that these "hooligans" were involved in a major cross-border money laundering case. In order to protect his threatened sister and former mentor, Yunjia gritted his teeth and continued to "act" - pretending to be a thug during the day, and memorizing lines and writing scripts at night. To make matters worse, the real undercover agent disappeared, and the gang leader began to trust him more and more... In his "acting career" full of laughter, Yunjia fooled the audience with improvisational performances while secretly collecting evidence, but he did not know that he had already been trapped in a dangerous whirlpool. Can he finish this drama alive?
