Soo Yeon lives a dull and boring life daily because her husband is always busy with work and goes fishing when he is not working. One day, Soo Ji, one of her high school friends, moves to the house next door. When Soo Yeon happens to watch sneakily Soo Ji and her husband Sang Min having sex, her desire becomes so strong that she soon has a hard time trying to suppress it. Soo Yeon ends up having passionate sex with Sang Min one day when Soo Ji is away on a business trip.

That night, as Soo Ji spots Soo Yeon and her husband getting out of a car together and her husband being sweet with her, Soo Ji becomes suspicious of an appropriate relationship between the two. Next day, when Soo Ji asks Soo Yeon to meet her outside, Soo Yeon reveals a shocking story to her.