Two American GIs are the only survivors of a unit wiped out in a battle with Japanese troops on an isolated island. The two, who don't like each other, find try to put aside their differences in order to evade the Japanese and survive.

Unpopular at school because of his high I.Q., neglected by his weak and alcoholic father, Marvin is easy prey for the campus vamp, Betty, who pretends an interest in Marv only so that he will write her term paper. When the two are discovered cheating by their professor, the longed-for scholarship recommendation is withdrawn. Meanwhile the jealousy of Betty's boyfriend has been aroused and when Marv learns that he can only hold the girl's affections by offering her riches, he plans a million dollar robbery. Even the professional gangsters with whom he works are amazed at the brilliance of the young genius.