Elizabeth Allen sama sekali tak senang waktu diputuskan ia harus bersekolah dan tinggal di asrama. Di rumah ia memiliki segalanya, apa saja yang bisa membuatnya senang. Di sekolah pastilah ia akan tersiksa. Maka Elizabeth memutuskan untuk menjadi anak paling nakal, paling badung. Tetapi ternyata hasilnya jauh di luar dugaannya.
Mr Pink-Whistle is half-human and half-brownie, and he has a special talent for making himself invisible. Many children are eager for his help, and he is always glad to oblige, with a sprinkling of mischief and a twinkle in his eye.
Something mysterious is going on at Tigger's Barn, and the Secret Seven are intrigued. Peter thinks it's all just gossip, but Jack isn't so sure when he overhears a strange conversation. Looks like the Seven are on the trail of another exciting adventure!
Who stole the money that the old man in Holly Lane had so carefully hidden in his cottage and where is it now? Why did his furniture disappear in the middle of the night? Fatty and the other Find-Outers have a long list of suspects, and a few clues, but this latest mystery just won't be solved! Mr Goon, the policeman, is hot on the scent too and he is sure that he has the answer when the others…
Larry, Daisy, Fatty, Pip, Bets and Buster are immediately on the trail when two robberies take place in the village, and though the thief has left enormous footprints, it seems as if he is able to enter houses without being seen.
Where could Mr Goon's nephew have disappeared to? Mr Goon has forbidden the Five Find-Outers from solving mysteries - so they decide to make one up for his nephew, Ern! But what will happen when Ern disappears, and their pretend mystery turns into a real one?