The boys are poor and living together in a run-down shack. However, their numbers come in, and they become rich overnight. They split their millions and each sets out to build a mansion across from each other. However, Tom is jealous of how well his furry friend is doing with his building project, to say nothing of being plagued by incompetent, lazy, surly union workmen. Trying to do the labor himself only exacerbates matters and drains his bank account. At the end Jerry and Tom both have sumptuous homes—but Tom's broke, and his house falls away to reveal it's just a hollow shell around the shack from the opening of the picture, that too fell away to reveal Tom.

Tom and Jerry discover their world is full of dinosaur eggs.