Choi, Im, Hwang and Park are the most prestigious and powerful family at the South Korea. This four prestigious family have four beautiful daughter, they are the only heiress of the Choi, Im, Hwang and Park's Corporation but no one know their truth identity well except some close friends because their parents want to protect them. The four daughters are like sisters since their parents are best friend. They went at the same university, study in business. They are smart and quiet but why everyone in the university bullied them? Well because of their big glasses and the out of the clothes. But outside of the university, they are very fashionable.

Jessica, Yuri, Taeyeon and Sunny are the most beautiful and popular girls in the university. Study in business with the four heiress but of course they don't know their identity. The four of them grow up together and they are like sister.  Everyone want to be their friend and lover. There's one problem, they are never serious in a relationship, they changes partner like they changes their clothes. Their father is the left and right hand of the CEO of the Choi, Im, Hwang and Park's Corporation. They can get whoever they want in the university....well except four girls.

What will happen if one day, they made a bet to win those bullied girl's heart then dump them. Will they find their true love during the bet? What will happen when the quiet girls become players and the players become the quiet girls? And the big problem, what will happen when the four heiress are force by their parents to get married with someone they never met (or they think they never met)? Will they accept this marriage?