Who is the large-footed thief committing a string of daring daylight robberies in the quiet village of Peterswood? The cunning burglar leaves behind enormous footprints and people have heard his distinctive cough, but somehow, he manages to remain completely invisible!

Mr. Goon, the bumbling village policeman, is eager to solve this baffling mystery and put his brand-new disguising skills to the test—techniques he just learned from a special police refresher course. But the Five Find-Outers—Fatty, Larry, Daisy, Pip, Bets, and their faithful dog, Buster—are already hot on the trail. With Fatty using his own brilliant disguises to outwit Mr. Goon at every turn, the young detectives must track the giant footprints and hunt down the elusive suspect. The race is on: who will crack the clues and unmask the invisible thief first, the Find-Outers or Mr. Goon?