Tom and Jerry stay at Rick's Aunt's house. but when a cooped-up dog trades places with Tom. Stuff gets out of hand when Tom becomes a dog and Jerry scores a female cat.
Tom is tasked with keeping Jerry from bothering a snooty cat, belonging to the Duchess' friend, but the fancy cat has Her intentions on capturing Jerry.
When Ginger takes in a hamster left on the doorstep, it escapes and Tom has Jerry posing as the hamster, but soon they discover more hamsters are in the cage multiplying.