Lizzie and Dad live in a rainy town in the north of England. It's just the two of them, and Auntie Doreen, who pops round to check Lizzie's spellings and tell Dad he's daft - and make them nice hot dumplings. But today there's something unusual going on: why is Dad building himself a pair of wings and studying the birds to see how they fly? The Great Human Bird Competition of course!