After 5 years, Kai finally comes back home in order to face the past he couldn't let go. With a help of his friend, Sehun, Kai tries to overcome his grief over Sulli, the girl he loves the most.

Bearing the guilt of losing her, Kai struggles to move on and has become a lost cause. But what happens if fate gives him another chance to turn back the clock? Will he succeed this time or will fate deny him a chance again?