"Midsommar" follows a group of friends, including Dani (Florence Pugh) and Christian (Jack Reynor), who embark on a trip to Sweden for the Midsommar festival, which takes place every 90 years in a remote pagan community. The group, consisting of friends from college, plans to document the festival, but things take a dark turn when they become embroiled in the sinister rituals of the community.