In this eerie and supernatural horror film, a struggling Korean writer travels to Vietnam to research a legend about a cursed portrait of a Vietnamese girl named Muoi. Along the way, she uncovers a dark history of love, betrayal, and revenge that threatens to consume her own life. As she delves deeper into the mystery, she must confront her own demons and face the evil spirit of Muoi, who seeks to punish those who wronged her in the past.