Ji-soo, a famous university professor and wife of Jeong-ho, a best selling writer can't help but suspect her husband as she is full of jealousy and Hye-in, a provocative and attractive university student who jumps into the unstable life of this couple. Jeong-ho feels Hye-in looks just like his first love and considers her a muse to writing a new novel through the Role Play. His wife gets jealous when she reads his novel and has sudden intercourse with him as if she is aware of Hye-in.