Thank goodness Fatty is back from his holiday, so that the Five Find-Outers Pip, Bets, Daisy, Larry, Fatty, and Fatty's dog Buster - can be united at last and set about finding something to puzzle over! Ern is back too, with Bingo his new dog. PC Goon isn't too keen on Bingo - or the Five Find-Outers. But they keep out of his way by visiting Banshee Towers where they discover an intriguing mystery.