What happens when two angry heartbroken girls get together and form a revenge plan against the guy who cheated on them? What happens when it all goes wrong?

Lee Joon has always been a player. But Minjoo, his best friend forever and current girlfriend, thought he could change for her. And he did. Until he met Eunyoung and couldn't resist. Now he has two very angry and upset ex-girlfriends who are set on revenge. 

They hire, Hyuna, a girl who attends their college and is majoring in acting. Her goal? To make Lee Joon fall head over heals for her... And then break his heart.  But what will happen, when the job turns into something real? And what if one of the ex-girlfriends wants Lee Joon back?