When Willie finds a map from one of his dead relatives, he and ALF trek to Death Valley to try and find a possible treasure. Things don't go as planned when ALF drinks all the water beforehand and then gets too hot from the sun.

Fearing that he might "internally blow up" due to his high calorie consumption, ALF decides to cut meat from his diet. However after a few days, ALF turns into a "wolf" and steals the Tanner's car in an effort to hunt for food.