Meet the Flying Doctors: Princess Pearl, Sir Gadabout and, of course, their trusty 'air ambulance', Zog the dragon. There's lots to do, as they fly around tending to a sunburnt mermaid, a distressed unicorn and a sneezy lion. But should princesses really be doctors? Pearl's uncle, the King, doesn't think so - until he himself falls ill, and only Pearl knows how to cure him.