Five young detectives get back together for summer vacation. This time they are investigating the mysterious disappearance of an expensive Siamese cat - Lady Candling's pet, Pip and Betsy's new neighbor. Policeman Get Away and grumpy gardener Mr. Skloking are about to accuse gardener's assistant Luke of stealing, but the detectives refuse to believe that this good-natured lad is a thief. Who then stole the cat?
