A prince has disappeared and it seems that twin babies are the only clue! Is the prince being held against his will? The Five Find-Outers and Mr Goon's nephew, Ern, intend to track him down and rescue him.
Gosh, this one kicks into high gear towards the end! It starts out with a lot of fun and games when Fatty, Larry and Daisy return from holidays abroad. Everyone is tanned—including Pip and Bets, who have been lying around in the garden a lot. After hearing about the Prince Bongawah from Tetarua State, who is staying at a camp on the hills between Peterswood and Marlow, Fatty decides it would be fun for his friends to put their tans to good use by dressing up in colourful clothes (which he brought back from Morocco) and pretending to be relatives of the Prince. Ern Goon, nephew of Old Clear-Orf, chooses that moment to turn up with his two younger brothers, Sid and Perce, and Fatty immediately introduces his "distinguished visitors" as Princess Bongawee (Bets), Pua-Tua (Daisy), Kim-Pippy-Tok (Pip) and Kim-Larriana-Tik (Larry).