Midsommar

Dani Ardor (Florence Pugh) suffers a tremendous loss when her sister Terri kills herself and their parents through carbon monoxide poisoning. Dani's only source of support is her emotionally distant boyfriend, Christian (Jack Reynor), an anthropology graduate student who has debated ending the relationship for a long time. When Christian, Mark (Will Poulter) and Josh (William Jackson Harper) reveal their plans to go with their Swedish friend, Pelle (Vilhelm Blomgren), to a midsummer celebration at his ancestral commune, the Hårga, in Sweden, Christian reluctantly invites Dani along. In Hälsingland, Sweden, they're joined by a British couple, Simon (Archie Madekwe) and Connie (Ellora Torchia), also there to witness this celebration that only occurs once every ninety years. At the commune, the guests and members are regularly given drugs that cause Dani to see hallucinations of her late sister. Such traditions of the Hårga begin to disturb her, even as Christian insists they're simply a fascinating group who will make an interesting anthropological study. As their time in the commune goes on, however, and the outsiders are invited to participate in more and more brutal rituals, it becomes clear that the Hårga are not the peaceful people that they seemed.

'Midsommar' is written and directed by Ari Aster ('Hereditary').