The plot revolves around two American high school pals on the verge of graduation. One is passing German thanks to his German pen pal, who translates his homework. But when the German expresses feelings for the teen and suggests a meeting, the student rebuffs the mysterious writer, thinking it's the act of a sexual predator. He soon discovers the pen pal is actually a fetching fraulein, and the pair sets off on a trans-European road trip.