Florence Pugh

Several friends travel to Sweden to study as anthropologists a summer festival that is held every ninety years in the remote hometown of one of them. What begins as a dream vacation in a place where the sun never sets, gradually turns into a dark nightmare as the mysterious inhabitants invite them to participate in their disturbing festive activities.

A brother-sister team who fake paranormal encounters for cash get more than they bargained for when a job at a haunted estate turns very, very real.