Splat is not happy to hear that Spike will be coming over for a play date after school, but when their class starts swimming lessons the two discover that they have more in common than a love of candy fish.

Splat the cat's bicycle bumps and jumps over the bumpy track on his way to school, until . . . crack! Splat takes a tumble off of his bike and finds himself nose to beak with a duck. When the duck does not make a sound, Splat packs the duck in his backpack along with his school supplies to his teacher, Mrs. Wimpydimple, who will know what to do, and heads off to Cat School.

A nervous Splat finds his first day at Cat School much better than he expected.