The time is 1943...

Hongjoong: The charming mafia boss

Seonghwa: The damsel's handsome boyfriend, who is an actor

Yunho: A CEO of a large business, secretly helping Hongjoong

Yeosang: The private detective, a friend to Seonghwa

San: A handsome singer and a witness in the damsel's kidnapping

Mingi: The handsome soldier and friend to Yunho

Wooyoung: A handsome singer and witness in the damsel's kidnapping, San's friend

Jongho: Yeosang's partner