Kang Joonsang moves to a new high school in search of his biological father. Jeong Yoojin and Kim Sanghyeok are close childhood friends, although Sanghyeok wants to be more than a friend, Yoojin sees him as a brother. On a trip together with other high school mates, Oh Chaerin, Gong Jinsook and Kwon Yonggook, Yoojin is saved after an accident by Joonsang. They become close and she opens up his cold heart. However, circumstances and fate dictate that their love will never be. He abruptly disappears from their lives. Ten years later, the old High School buddies gather to celebrate Yoojin and Sanghyeok's soon-to-be wedding. Yoojin, who was deeply in love with Joonsang, still has a fire in her heart for him. But at the party, Oh Chaerin's new boyfriend arrives, who appears the same as Joonsang.

배용준Kang Joon-sang

최지우Jeong Yoo-jin

박용하Kim Sang-hyeok

박솔미Oh Chae-rin

이혜은Gong Jin-sook

류승수Kwon Yong-gook

송옥숙Kang Mi-hee

정동환Professor Kim Jin-woo

Kim Hae-sookYoo-jin's Mother

Jang Hang-seonSupervisor Kim

정원중Teacher Park Jeong-o

하재영Jeong Hyeon-soo

이효춘Sang-hyeok's Mother