

Three years ago, the Jones family conspires with Jett Harrington's ex-girlfriend Hannah Mack to frame him and send him to prison. Behind bars, a master takes him under his wing, teaching him unmatched martial arts and skills, and leads him to conquer the Western World, where he earns the nickname "The Reaper." He returns home to settle old scores, and along the way saves Sylvia Cole by chance. Unwilling to accept a family-arranged marriage, Sylvia asks him to be her shield and fake a marriage with her instead.

Yeon-Woo, the heir of the organization Sipgangpa, disguises herself as a boy to infiltrate an all-boys school and eliminate the heir of the rival organization Makgangpa. However, as she catches the attention of a handsome trio, romance begins to blossom in her used-to-be noir life. One of the three is apparently the heir of Makgangpa—will Yeon-Woo be able to complete her mission without falling in love?