A group of five classmates is trapped inside their school bus after a mysterious creature invade the road. Time runs and every passing minute decreases their survival chances against the constant threats of that unknown entity.

Philip, a solitary proof reader, is trapped in his apartment, too afraid to leave and tortured by an unknown evil force that has kept him prisoner for the last two years.

After a strange sighting, four friends decide to move in the near woodlands to investigate. Soon their week-end becomes a nightmare and a race for survival.