 Oswald is fixing up a rundown trolley with the help of some bunnies. He takes it for a test drive and many of his friends climb aboard at various stages of the trip. They re held up by a cow on the tracks, but they manage to squeeze by, afterward running into a very steep hill that sends them back the way they came. A stubborn goat solves their problem, but when they pass the crest of the hill, they wind up on a roller coaster ride down the other side.