Manchester, 1990. On a troubled estate, Alice is roped into babysitting for her neighbour, whose children claim to feed a nightly visitor from Hell. Between gangland tensions, local superstition and drug withdrawal, Alice must decide whether to abandon her new wards or stay the night.

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.