Yoon Hyunwoo is a pharmaceutical salesman with a secret craving. By day, a diligent office worker, by night, a dom... or so he wishes. Unfortunately, his girlfriend, Soojin, has no interest in BDSM. Worse yet, she’s his top client, so breaking up is out of the question. Frustrated and seeking release, Hyunwoo turns to an app to find a willing sub. What starts as harmless online flirting soon leads to a meeting—and the surprise of his life. His chat partner is none other than his cold, no-nonsense boss, Park Gaeun. As their late-night sessions grow more intense, the lines between dominance and submission, work and pleasure, begin to blur beyond control.