Yu Jin and Sang Hyuk are close childhood friends who do everything together with their friends Chelin, Jin Suk and Yong Kuk. When Joon Sang arrives in town, Chelin claims him as her own. Joon Sang seems to have a grudge against Sang Hyuk and tries to aggravate him.  He even manages to win Yu Jin's heart to the surprise and disappointment of their friends, especially Chelin.  This causes jealousy and anger until an accident occurs that disrupts their lives.

This is a show about the power of love - whether it be pure or an obsession - and how it affects the lives of the ones we love by the decisions we make.