Anerdyhighschoolsuperwhizexperimentswithachemicalwhichwilltransformhisguineapig\"Mr.Mumps\"fromagentlepetintoaravenousmonster.Inafitofrageagainsthistormentorsatthehighschool,VernonPotts(PatCardi)goesonakillingspree,eliminatingallofthosewhoeverpickedonhim-theGymCoach,theSchoolJock,TheCreepyJanitor(Mr.Griggs)&hishatedteacher,Ms.Grindstaff.Intheendhegetsthejock'sgirlfriendforhimselfbuthishappinessisshort-livedasthepotionturnshimintoamonsterhuntedbythetownslamepoliceLieutenant-Bosman.