Traumatised and still struggling to come to terms with an appalling family tragedy, the American graduate student, Dani, turns to her self-centred and distant boyfriend, Christian, against the backdrop of an inescapable break-up. In high hopes of repairing their disintegrating relationship, Dani tags along with two of Christian's fellow students and their cryptic Swedish friend, Pelle, to attend a once-every-ninety-years summer solstice festival at an isolated pagan commune in rural Sweden. Now, 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, allowing the uncomfortable feeling of uneasiness to creep up on Dani and her friends. In the eyes of the uninitiated newcomers, the naturalistic rituals seem brutal. Could a numbing truth be hiding in plain sight?