입금만 되면 뭐든 가능해지는 흥신소 사장 우수한 앞에 어느 날 열정 충만 비밀 요원 유다희가 현금 천 만원과 함께 무기 밀매 사건을 해결하자며, 대놓고 공조를 요청해 온다. 두 사람의 공조는 작전을 거듭해 갈수록 커져만 가는데…

Directed by Kim Hyeong-joo. With Kim Young-kwang, Sun-Bin Lee, Dae-hwan Oh, Seo Hyeon Cheol. A chinese secret agent Da-hee receives intel that a large number of illegal firearms are being smuggled into Korea and is sent to investigate the case. She meets Su-han, who was supposed to help her with the case but due to his lackluster skills, they keep fighting over really trivial things. But as their witnesses are suddenly murdered, the two of them quickly become the prime suspects.