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.
as Woo Soo-han
as Yoo Da-hee
as Jeon-hoon
as Chief Detective
as Cha-oh
as Shin Gi-roo
as Yuri
as NIS Team Leader
as Senior Detective
as NIS Agent
as Korean Mercenary Leader
as Kid's Mom
as Tango Instructor
as Park Doo-sik
as Ax Boss
as NIS Agent
as Doo-ho
as Dorothy
as Self
as Doctor
as Hacker
as MSS Director
as Da-rong
as Attache