Melchior, the Great Shoemaker, organizes a race. The winner is to get one of Melchiors own inventions. Dirty Rat thinks it will be possible to make money with such an invention, and he sends Melvin off to enter the race and win it. Switching the direction arrow around, he lures Lapitch and Lisa into the woods, where they are attacked by a wild boar. They outwit the boar, but meanwhile Melvin is on his way to the finishing post. Melvin wins the race and wins the invention for Dirty Rat too. Its disappointing to find that the prize is only a pizza oven, but Dirty Rat soon realizes that a pizzeria could be a gold mine!