 Danny is hopelessly in love with his teacher Peggy Noble. Of course she doesn t even notice him while she plans to marry the obnoxious coach Roy "Jack-jaw" Kelton. When Danny s friend Lloyd invents a growth accelerator for fruit and vegetables to "solve world hunger", Danny uses it on himself and as an adult tries to show her Roy s real personality. However at his first appearance at school as an adult, he s mistaken for someone else...