A cat enters a barn and terrorizes a community of mice. Smart Mouse and Friend Mouse think they have solved the problem when they make a collar with a bell for the cat. But who will put the collar on the cat? Wee Mouse, Tiny Mouse, and Teeny Mouse nearly meet their demise in the first attempt. The Rat Pack offers to do it for a fee, but quickly surrenders. Then Smart Mouse and Friend Mouse figure out a way to get a human to help them.