Mr. and Mrs. O'Grady are so poor they have just one of everything to share - one potato a day, one chair, one blanket full of holes, and one gold coin for a rainy day. After digging up the last potato in their patch, Mr. O'Grady comes upon a big black object. It's a pot - no ordinary pot, for what they soon discover is that whatever goes into it comes out doubled Suddenly the O'Gradys aren't destitute anymore. But what they really long for is...