Woo Soo-han is what you would call "the total package." He's young, physically fit, handsome, and has a thriving career. He has everything anyone could desire, except for a relationship. This never bothers him as work always takes precedence.
Everything changes when he meets the wife of his close (and subordinate) colleague, Nayoung. From the moment he lays eyes on her, he feels an inexplicable attraction. Soo-han knows it's wrong and tries to forget her, but when the two coincidentally meet at a nightclub, he ends up bringing Nayoung home, completely intoxicated. Upon discovering her husband isn't home, Soo-han realizes he can no longer control his desires.