Deep in stark woodland at the base of Mount Fuji, restless whispers echo as the light fades on a mid-winter afternoon. Here, amongst a maze of roots, a lone figure takes her life, binding her body to the branches and her spirit to the undergrowth.

Years later as the crows scatter, Miko and her college friends head into Suicide Forest. Miko yearns to abide a Halloween ritual steeped in demonic tradition which will release her mother’s trapped soul. Filming their journey amongst the shadows, strange things start to happen; angry murmurs and sightings of ghosts warn there are those who do not want them there.

In the Sea of Trees an ocean of lost souls rises up, closing heavy boughs around Miko and her friends. Suddenly, the path to life is barricaded by the dead who have nothing to lose…