Midsommar

In the middle of winter, an American student, Dani, is traumatized after her sister Terri, who has bipolar disorder, kills their parents and herself via carbon monoxide poisoning in a murder-suicide. This strains Dani's relationship with her already increasingly distant boyfriend, Christian. Several months later, Christian and his friends Mark and Josh have been invited by their Swedish friend Pelle to attend a nine-day midsummer festival at his ancestral commune, the Hårga, in the rural Hälsingland region of Sweden. The festival occurs only once every 90 years. As they immerse themselves in the pagan cult's disturbing festivities, Dani must confront her own grief and the sinister secrets of the Hårga commune, leading to a dark and terrifying climax that will test her resolve and humanity.