A gang of friends play truant from school to hang out in the woods where some hot rodding on a stolen moped changes the fate of their day. They crash into Peter, a disheveled drifter, who is delighted to have a group of teens to hang out with. First he gains their trust by joining in their games, but then his behaviour begins to change. Peter uses what he has learned about the kids against them, bullying the alpha boys, belittling the weaker ones and saving his worst for the only girl of the group. Realising too late that they are being held hostage the kids have to resort to dirtier games to survive the ordeal.