When a package bound for Good Good Island is mistakenly delivered to Bad Bad Island, the Bad Bads find something frighteningly horrible inside: a little girl named Rosa! Unable to choose between throwing her into a volcano or tossing her into the sea, the creatures of the island finally agree that their ruler, The Idol, should decide. He challenges Rosa with a series of impossible tasks - but what happens when she starts doing the impossible? This inventive adventure shows that sometimes family and goodness can be found in the most unlikely places.