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.
This is the incredible story behind Sweden's most notorious gangster, Clark Olofsson, whose infamous crimes gave rise to the term "Stockholm Syndrome".
A strange illness spreads among the participants of an illegal rave.
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