A man and his daughter are attacked in the woods by what they believe is a Bigfoot-type creature. However, they soon begin to suspect that they may have stumbled onto a nest of aliens in a hidden spacecraft.
Après avoir ruiné la cérémonie de remise des diplômes de son lycée, Matt Stifler, petit frère de Steve, est envoyé à Toal Oaks durant tout l'été en guise de punition. Mais le jeune Matt a bien des idées en tête...