Danni (Florence Pugh)'s sister committed suicide due to mental illness, and killed their parents when she died. This huge blow caused Danni to suffer from depression. Christian (Jack Reynor) is Danni's boyfriend. In fact, he had decided to break up with Danni a long time ago, but the tragedy and Danni's poor condition forced him to postpone his breakup plan indefinitely. Christian and his classmates Perle (Vilhelm Blomgren), Mark (Will Poulter), and Josh (William Jackson Harper) decided to go to Perle's hometown together, a remote village in Sweden, where the ancient culture and sacrificial activities will become the subject of their graduation thesis. At Christian's invitation, Danni also joined the journey.