Autumn Equinox, late 20th century.
Four friends travel to an isolated house deep in the forest to perform a witchcraft initiation ritual and complete the circle of the four elements.

Lily, a pale and introverted twenty-something who has just joined the group, has been chosen to represent the element of air.

But what begins as a white witchcraft ritual in harmony with nature soon turns into a diabolical nightmare.
Lily has no idea that the true purpose is something else entirely and that she herself is the sacrifice.