Posy Pinkerton must step out of her shell. For this late-20s serial monogamist, life has been clean crusing. She's obtained Tom, her physician fiancé; her burgeoning profession as a medical illustrator and a facet passion as a visible artist. However after an opportunity encounter with Jack, a good-looking and worldly businessman, Posy's shell begins to crack. She finds him mysterious and he finds her charming, and for Posy it is a chance to strive on confidence for measurement. Posy is reluctant to take it any additional than petty flirting, however her cousin Laura, her polar reverse, pushes her for one final fling earlier than settling down with Tom, her one and solely. Posy's rising want to interrupt free permits her to train her inside self with Jack, an alter ego she's created referred to as the Queen of Sin. Little does Posy know, as she's being swept up by Jack, she's actually making a take care of the satan.