Heechul, Rainie and Kyuhyun are siblings who were brought up in different countries and on their 18th birthday,they were each brought back to Korea. After returning, they were informed that their parents were involved in an 'accident' and were forced to support themselves with what their parents left behind. Years later, the three of them set out on a winter vacation trip hosted by their school at a historical mansion called Miinah. Here they meet the Miinah household, the royalties who own the mansion. Memories begin cringing down Heechul, Rainie and Kyuhyun's entire existence as they realize even though some people have certainly left them, there are those who have always stayed. In the midst of the mysteriously familiar mansion, the dangerously attractive men and women, Rainie has been forced to face Yesung, the one man who will never leave her alone. Some say he's being unanimously annoying, other's say he's just trying to create some Beautiful Chances.