[1] The Five Find-Outers (Fatty, Larry, Daisy, Pip and Bets) are together again during the school holidays.

Bored without a mystery to solve, they decide to practise disguising themselves and shadowing people.

The house belongs to a blind old man, who has apparently hidden his savings somewhere in the furniture.

The suspects include Wilfrid, the old man's grandson, and his cousin Marian.

When Marian herself disappears, suspicion falls firmly on her and bumbling village policeman Mr Goon is convinced she is the thief, but Fatty thinks differently.