This is a story about three brothers who doesn't get along that well. Three sons of a Billionaire. Eldest is Lee Sungmin who is always serious about his life. Always wants to study abroad. Who wants to build his own empire to get out from his Dad's shadow. Next is Lee Hyukjae aka Eunhyuk who wants to be a professional dancer and singer but of course his dad doesn't approve any of these. Lastly the youngest of the three; Lee Donghae the arrogant, selfish, happy go lucky and the most spoiled one. Behind his angelic looks an evil mind is hiding. He is the so called black sheep of the Lee Family because he always go clubbing, drinking, having one night stand on different girls. He always fought with his Dad because of his actions. But then there comes a woman named Kim Minhee who enter their life out of nowhere. What will happen to the four of them?