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.
A former Naval officer with a dark past must face off against an insurgent with a sound sensitive bomb.
In the household of Lee Gyeong-jin, a high-ranking official of Joseon Kingdom, three sons die from an unidentified horror. A woman pregnant with a child of the third son soon learns of the evil spirit that haunts the house.
