Three plastic toys named Cowboy, Indian and Horse share a house in a rural town. Cowboy and Indian plan to surprise Horse with a homemade barbecue for his birthday. However, they accidentally order 50 million bricks instead of the 50 they actually require. This sets off a chain of events as the trio travel to the center of the earth, trek across frozen tundra and discover a parallel underwater universe of pointy-headed (and dishonest) creatures.