Traumatised and still struggling to come to terms with an appalling family tragedy, Dani, an American graduate student, turns to Christian, her self-centred and distant boyfriend, against the backdrop of their inevitable break-up. In high hopes of repairing their disintegrating relationship, Dani tags along with two of Christian's companions, and their cryptic friend, Pelle, to attend a once-every-ninety-years summer solstice festival at an isolated pagan commune nestled in the heart of the Swedish province of Hälsingland. At last, for the first time in a long while, Dani feels happy. However, in this friendly and verdant haven of peace, harmony, and constant sunshine, the welcoming community's peculiar traditions start to blemish the folkloric utopia, as the uncomfortable feeling of uneasiness starts to creep up on Pelle's guests. But, in the eyes of the uninitiated newcomers, the naturalistic rituals seem brutal. Could a numbing truth be hiding in plain sight?