Billy isn't one to back down from a bet. But this one is gross: If he eats fifteen worms in fifteen days, Alan will pay him fifty dollars. Billy takes the bet and tries worms smothered in ketchup, drowned in mustard, even breaded and fried. Worm by worm, Billy gets closer to victory, and to buying the minibike he's always wanted. But Alan won't let him win that easily...