4 Destiny Project - Episode Guide

Yot and M have been close friends since childhood. After Yot gets into a fight with his mother, Yot, M, and Arm get drunk together. 

Yot and M had a huge argument stemming from the events of that night, with Yot deciding to kick M out of his house. However, M was involved in a fatal accident later that very same night. Yot is still struggling to come to terms with everything that happened, but M has returned to demand Yot fulfill a promise about becoming a monk. Yot had mentioned it before M's death, and now Yot is tormented by the events.

1 immortal and 1 reborn, their promises to each other would be a cold-blooded vow of revenge. Back when the thieves' neighborhood was threatening, a young, passionate cop and his buddy failed to arrest the thieves there. They had to run away from the thieves' assaults. Both of them were seriously injured and found a place to hide themselves. Unfortunately, his buddy didn't make it that night. The deafening gun and bomb sounds were mingled with his plaintive moaning voice. The only answer to his miserable begging was the dark shadow blocking the red moon. An abandoned house in the heart of the battlefield was turned into a hotel built by the landlord to await… the return of someone. The endgame was about to kick off. Once he set foot in the hotel, the gate of hell would open as the beginning of the curse.

Harun (or Hart), a successful young businessman, finds his personal life far less smooth than his professional one. He encounters Un-In, his former lover and a singer, once again. Hart tries to find a way to reconcile, even though Un-In attempts to push him away, and a new, seemingly close friend named Pete has entered Un-In's life. However, Hart refuses to give up, determined to re-enter Un-In's world.

When Hart realizes that Pete has feelings for Un-In, he becomes jealous and persistently tries to win Un-In back. This only makes Un-In uncomfortable, and for some reason, it leads to Un-In feeling slighted. Un-In breaks up with Hart on their fifth anniversary. As time passes and their anniversary approaches again, Hart desperately pleads for them to spend time together once more. They engage in activities together, and Hart apologizes. Both of them cry, acknowledging the love that still lingers between them, before Un-In falls silent, offering no reply.