This is the story of a man who gets a wedding invitation from his first girlfriend, whom he had in high school.

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…

Tae-jin, a patrol officer, gets into an accident while investigating a case, and his soul gets separated from his body. He is desperate to solve the case and return to…