A high school teacher whose wife is about to give birth finds himself tangled in temptation and obsession when a student falls for him.
The probability of a couple that had broken up getting back together and having a successful relationship is just 3%. Dong-hee and Young, who had broken up over a minor tiff, later realize their love for each other and end up getting back together. But will they be able to fit into the 3% bracket?
A dark secret hidden surrounds a mysterious girl who is an outcast the entire village alienates and a boy who tries to get close to her who has a tragedy of his in his past. As romance blossoms so do rumours.
