

Woo-Yeon, a second-generation chaebol, starts an internship at her father's company, where she works with Jae-Hwan, a notoriously prickly but highly capable and sexy boss. She soon discovers that Jae-Hwan’s wife, Ji-Su, was the one who bullied her in the past. Determined to get revenge, Woo-Yeon decides to make Jae-Hwan her own man.

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?