Je-In is a mystery novel writer. She chases after a serial killer with her longtime friend Rok-Hwan. Rok-Hwan is a detective. A handsome and mysterious man, Jason, appears in front of them. 

Seok-jin, a magician at a club, meets a mysterious woman, Ha-yeon, who soon becomes his assistant and fiance. Things take a turn when she is found dead and he must find out what happened.