In the supernatural horror thriller Haunted Mountains: The Yellow Taboo, a journey into the wilderness turns into an endless nightmare for a young couple. While exploring the deep mountains, Chen and his girlfriend Song encounter the legendary yellow raincoat ghost, a terrifying entity shrouded in mystery. The encounter takes a dark turn when Song dies tragically, leaving Chen devastated. However, the horror does not end with her death. Chen soon finds himself trapped in a relentless time loop, forced to relive this miserable day over and over again. Every single night, he must witness his beloved Song die a tragic death, only to wake up to the same terrifying reality the next morning. Desperate to break this endless cycle of grief, Chen must find a way to outsmart the yellow raincoat ghost and escape the haunted peaks. Will he find a way to save Song, or is he doomed to watch her perish for eternity in these cursed mountains?