How much can you change? How far can you go? What does it mean to be a Pick-Up Artist?

Lee Donghae is sick of being the left alone loser at University. While everyone around him is super happy and in a relationship he barely gets in contact with females...or other individuals at all.

One day he tries to change his life and goes out all by himself when he accidently bumps into Taecyeon - a famous Pick-Up Artist.

He encourages Donghae to change his lifestyle and turns him into a womanizer par excellence.

Donghae step by step loses control over his own desires and doesn't even stop when it comes to his childhood friend Yoona - even after finding the woman of his dreams: Jessica Jung.

How far will he go and is he able to find happiness after turning into a Pick-Up Artist?

Or will he lose his original personality and become a heartless lothario?