Shark Car and UmiCar are best car friends, and they're racing together as a team in the Umi Grand Prix, the biggest race in Umi City. However, some of Team Umizoomi's meanest rivals, the Shape Bandit, Dump Truck, Squiddy, and the TroubleMakers are in the big race. Even with help from Milli, Geo, and Bot, can the two best pals win this big race?