The Clue of the Broken Blade

Frank and Joe Hardy find themselves in a thrilling mystery when their fencing master's inheritance depends on a lost, broken saber. Their investigation takes a complicated turn with a bank robbery that impacts their father's work. Using a new scientific device, the boys track the robbers to California, where they must outwit the gang while also searching for the crucial saber piece. A surprising discovery at a movie set holds the key to solving both cases.