A gang of young sleuths and a trusty terrier put their noses to a bank robbers' trail

Ellery Queen's young apprentice, Djuna, is preparing for an afternoon of fishing when a stranger leans out of his car window and asks for directions to Canada. A few minutes later, Djuna watches as the man's friends come running out of the local bank and into the getaway car, guns blazing, before taking off for the Canadian border.

It is a mystery that could baffle even Djuna's famous boss, but with the help of a ferocious black Scottie named Champ and a few crime-solving...