With no clue how he came to be imprisoned, drugged and tortured for 15 years, a desperate man seeks revenge on his captors.
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.
Three men who share a past participate in a mixed martial arts reality show where they have to fight against other contestants to win the prize money.
Yun-jeong, a skilled painter, disguises herself as a man in court to continue her family's legacy. Circumstances become difficult when her relationship with Kang-mu draws jealousy from the others.
