Sara (Natalie Dormer) has a twin sister Jess (Natalie Dormer again) who was seen entering the infamous Suicide Forest near Mount Fuji in Japan. Sara knows Jess is still alive and travels out to find her. Once arrived near the Aokigahara Forest, she learns that it is filled with the ghosts or people who committed suicide there, but according to a local guide: whatever you see or hear here is not real, it is all in your head…