Gunmu Cha's final mission is to steal a precious diamond. While gathering intel at a club, he saves Teo Yeon from getting blackmailed. But what business does he have with a rich kid who's always at the center of drama? Gunmu needs to avoid getting involved with Teo for the sake of the mission, but their natural chemistry leads to one steamy encounter after another. As the secrets keep building between them, who will get burned first?