Two men and two women, their relationship begins in tragic fates, and it grows into love, agony, and parting.
Starring Song Seung-heon, Song Hye-kyo, Won Bin, Han Chae-young, Han Na-na, Sunwoo Eun-sook, Jeong Dong-hwan, Lee Han-wi, Kim Hae-sook, Kim Na-woon