A military experiment to create a race of super-warriors goes awry, as legions of murderous zombies are unleashed upon a suburban neighborhood.

On the day of the Halloween party, Soup and Rob are finding plenty of ways to get into trouble: swimming in a local pond (though their mothers prohibit swimming so late in the year), pitching apples over a barn, and borrowing a cart which had drifted away from its owner. The grandest mischief of all, however, comes from their attempt to win the prize at the Halloween party, given to the entrant with the largest pumpkin.