It's a day at the races, and Team Umizoomi and UmiCar are competing in the Umi Grand Prix alongside their best friend, Shark Car! The race becomes a villainous all-star event when Team Umizoomi's past rivals turn out as fierce contenders. Dump Truck! Shape Bandit! Squiddy! The TroubleMakers! Can Team Umizoomi finish the race with Shape Bandit stealing bridges along the racecourse? Is the Team any match for Dump Truck's wet cement traps? Will the Team and Shark Car pull ahead of Squiddy and his seaweed launcher? And who knows what kind of mischief the TroubleMakers are brewing? It's a high-octane race to the finish in this action packed all-star special!