Ricky Ricotta is a lonely mouse. He has no brothers and no sisters to play with. Often he finds himself being picked on by bullies at school. He is waiting for his life to change for the better--for something BIG to happen.Meanwhile, Dr. Stinky McNasty, a bad rat scientist, is up to no good. He wants to take over the entire city of Squeakyville. He has built a monstrously-sized robot and now orders it to destroy the city! But to Dr. Stinky's surprise, the giant, gentle robot refuses, and with Ricky Ricotta's help, the robot gets away!