A phone call about an old classmate's death triggers a middle-aged man to look back on his past and the pained wish for a different past that may change his future.

A mother goes in search of her missing teenage daughter after her sudden disappearance. She is told that her daughter was last seen in the company of a girl in red, leading the mother to attempt to unravel the mystery behind the girl.

Based on true events and long-circulating urban legend in Taiwan. Wei is nowhere to be found one day before his grandma returns from her own strange missing incident. Wei's girlfriend desperately searches for his whereabouts...