Detective Ma Seok-do changes his affiliation from the Geumcheon Police Station to the Metropolitan Investigation Team, in order to eradicate Japanese gangsters who enter Korea to commit heinous crimes.

Woo-jin, a furniture designer who wakes up in a different body every day, falls for Yi-soo, a woman he meets through his work.

A likeable, married high school teacher spirals out of control when a student in his class begins unintentionally reminding him of his doomed first love, which ended 17 years earlier.