Four mental patients, the products of illegal medical experiments, escape from an institution in Britain’s rural Lake District. Armed with a stolen axe, they kill a game warden and mutilate a dog before encountering a broken-down bus. The vehicle’s stranded female passengers search for a place to spend the night, unaware that the psychopaths are right behind them. Anthony Forrest and Tom Marshall star in this notorious 1970s cult classic slasher! Four sadistic psychopaths who recently escaped from a prison mental hospital take out their demented hostilities on a busload of schoolgirls and two young campers.