What would Mrs Felonius like for her birthday? A new telescope? A gold eggbeater? Her husband, Captain Felonius, will give her anything she wants. But what Mrs Felonius would like most of all, she says, is to go to Piratesville to see her grandchildren.

"We'll be there in two shakes of a mackerel's tail!" replies the Captain. And so their rollicking birthday voyage begins. But does the Captain remember where Piratesville is? As the hours pass, Mrs. Felonius starts to wonder..