Garfield, hosting a tour of the National Cat Museum, narrates a story about a prehistoric cat. The cat was determined to cross a giant lake to reach the fabled "lasagna trees" that grew on a faraway island.
Jon takes in a weak stray cat, prompting Garfield to become envious of all of the attention the guest is receiving. With the new cat taking advantage of Jon's hospitality, Garfield sets out to make him leave.