Ari Aster writes and directs this American horror starring Florence Pugh, Jack Reynor and Will Poulter. Following a family tragedy, American student Dani (Pugh) decides to accompany her boyfriend Christian (Reynor) and his friends Mark (Poulter), Josh (William Jackson Harper) and Pelle (Vilhelm Blomgren) on a trip to Sweden to take part in a summer solstice festival that only takes place every 90 years. In Pelle's hometown, the friends initially receive a warm welcome but as the ceremonies and rituals get underway they begin to question their hosts' true intentions.