Mrs. Pepperpot has a problem—a huge problem—she shrinks! And when she shrinks she finds herself in all sorts of trouble. Mrs. Pepperpot is determined to practice her swimming, so when all the village children go for a picnic in the mountains she goes to the pool in the wood. But disaster strikes—just as Mrs. Pepperpot jumps into the water she shrinks! Now the pool seems as big as an ocean. Luckily there's a friendly frog nearby to rescue her and give her swimming lessons.