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 is supposed to help her with the case, but due to his lackluster skills they fight over trivial things. But as their witnesses are suddenly murdered, the two of them quickly become the prime suspects.
Kim Young-kwang
Lee Sun-bin
Oh Dae-hwan
Seo Hyun-chul
Choi Byung-mo
Kim Tae-hun
Julien Kang
Park Jin-su
Shin Hye-jeong
Jang Se-ah
Seo Min-joo
Choi Jong-nam
Seo Beom-sik
Shin Gi-hwan
Lee Joo-won
Hwang Jeong-min
Hong Seok-cheon
Jang Won-young
Noh Young-hak
Na Kwang-hoon
Yu In-seon
Woo Kang-min
Angus Yang
Ryu Joo Han
Park Ji-yeon
Lee Sang-hong
Lee Ji-hoon
Choi Tae-hwan
Park Kwang-jae
Jung Chang-hyun
Han Gab-soo
Kim Ho-young
Kwon Oh-cheol
Paul Battle
Lee Sang-min
Shin Jae Min
Jin Woo-jin
Go Da Yun
Jung Da-won
Choi Je-heon
Jeong Mi-kyeong
Hwang Sang-kyung
Fila Lee
Kim Byung-oh
Kim Won-jung
Kim Byeong-man
Lee Do-gyeom