Bagpuss, dear Bagpuss, old fat furry cat-puss, wake up, wake up and look at this thing that I bring...

Bagpuss, created by Oliver Postgate and Peter Firmin, is no ordinary cat. Bagpuss, the sleepy old cloth cat, lives in a shop owned by Emily, where lost and broken things are brought to be "mended" or given new stories. When Emily brings an object to Bagpuss, he and his friends wake up, ready to discover its secrets. Professor Yaffle shares his wisdom, Madeleine sings, Gabriel plays his banjo, and the mice add their fun ideas. Together, they make the shop a place where forgotten things come to life in the most magical way.

Emily finds a strange machine that the mice claim can turn breadcrumbs into butterbeans! Bagpuss and his friends are curious to find out if it's true. Professor Yaffle, ever the skeptic, doesn't believe it for a second, while Madeleine and Gabriel create songs about the machine's mysterious powers. The mice, of course, add plenty of fun and excitement as they demonstrate their amazing invention.