Stu recieves an order from Mucklehoney Industries for 15,000 "Patty Pants" dolls. Unfortunately, the machine he invented to mass produce the dolls isn't working correctly due to it assembling the dolls incorrectly. While Stu goes upstairs to take a break and think of a way to correct his machine, Tommy and Chuckie accidentally toss Tommy's Zippo-Glider toy plane into the basement (where the machine is located) and go down to find it.