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.

Half-human and half-vampire Seon Woo-hyeol, who was unable to become human due to a one day difference amidst 100 years, starts to live together with Joo In-hae, a woman who…