When quiet café owner Kim Jisoo finds herself face-to-face with Park Chaeyoung, the enigmatic and feared mafia queen of the city, her peaceful life is shattered in an instant. Drawn into a dangerous game of power, obsession, and seduction, Jisoo must navigate a devil's deal that could either destroy her-or awaken something darker within. Because Chaeyoung doesn't just want coffee-she wants her. And once the devil sets her sights on you, there's no turning back.