A brilliant woman, the secret heiress of a global organization, takes on a dangerous mission: to eliminate the successor of a rival conglomerate. To get close to her target, she disguises herself as a boy and infiltrates an elite boys' high school. There, she encounters three handsome heirs who take her under their wing, only to learn that one of them is the very man she is meant to destroy. Caught between her lethal duty and the genuine care they show her, she must decide if she can complete her mission without falling in love with her enemy. In this game of hidden identities and high-society intrigue, the undercover heiress is playing for her heart. A sweet and intense campus-style romance. Success is her final mission.