Four friends - Jack, who has clairvoyant abilities, his younger brother Tom, and their girlfriends Regan and Frankie - began researching the May holiday of Beltane for the school history club. Everyone knows that this is our “Peace, Labor, May!” And in decaying Europe - the Wicker Man and sacrifices for the glory of the coming summer. Nowadays they only burn fruits and vegetables, and even then not seriously, but they used to burn the chosen boy. A more pleasant fate awaited the girl - a knife stuck in her back. Jack and Frankie decide to take part in a modern imitation of the ritual for completeness. As luck would have it, at this very moment, in the nearby village of Bodine Summerlee, archaeologists tear off a horse’s head, once sacrificed to a Celtic deity. Some sinister force is awakening in the surrounding area...