


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
Woo Soo-han

Lee Sun-bin
Yoo Da-hee

Oh Dae-hwan
Jeon Hoon

Seo Hyun-chul
Chief Detective

Choi Byung-mo
Cha-oh

Kim Tae-hun
Shin Gi-roo

Julien Kang
Yuri

Park Jin-su
Senior Detective

Shin Hye-jeong
NIS Agent

Jang Se-ah
Kid's Mom / Shopkeeper

Seo Min-joo
Tango Instructor

Choi Jong-nam
Park Du Sik [President]

Seo Beom-sik
Ax Boss

Shin Gi-hwan
NIS analyst

Lee Joo-won
Do Du Ho

Hwang Jeong-min
Dorothy

Hong Seok-cheon
Self

Jang Won-young
Doctor

Noh Young-hak
Hacker

Na Kwang-hoon
MSS Director
Kim Hyung-joo
Kim Hyung-joo
Released