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When her twin sister disappears in Japan, a young American named Sara (Natalie Dormer) becomes determined to find out what happened to her. Sara's investigation leads her to the legendary Aokigahara Forest, located at the base of Mount Fuji. Accompanied by expatriate Aiden, she enters the mysterious wilderness after being warned to "stay on the path." Her investigation plunges her into a dark world where the angry and tormented souls of the dead prey on those who dare to explore the forest. Wikipedia