A young American couple, played by Florence Pugh and Jack Reynor, fly to a rural town in Sweden for a once-in-a-lifetime midsummer festival after experiencing a death in the family. Not long after the couple's arrival, their trip unfolds into a hallucinatory nightmare when the visitors are invited to drink some sort of concoction that seemingly screws with their perception of time, and are targeted by the sinister leaders of a pagan cult.
William Jackson Harper....Josh
rest of cast listed alphabetically
Filmography links and data courtesy of The Internet Movie Database.