Dongsoo is having a rough time. First he walked in on his girlfriend cheating on him. To make things worse, the new lawyer at his firm is Inhan, the guy she cheated with! Of course he can't avoid running into him at work, so he decides on revenge. One by one, Dongsoo starts (and succeeds!) in seducing Inhan's own partners. While Inhan finds Dongsoo annoying at first, he can't help but find something undoubtedly intriguing about him...