Team Umizoomi is visiting Chef Mario's new restaurant, where everybody loves his special dish, spaghetti and meatballs. But the TroubleMakers arrive on the scene and stir up some trouble by taking the stop button from Chef Mario's prized meatball machine! Now the machine is going crazy and won't stop making meatballs! Meatballs by the millions tumble through the city and it's up to Milli, Geo and Bot to get that stop button back. The Team bounds over mountains of meatballs that are stopping traffic, filling up the school bus and even the swimming pool! It all leads to a dramatic showdown with the TroubleMakers at Umi Tower. Can the Team save Umi City from meatball madness?