Helping in a case their father is working on, the Hardy brothers try to find an informer who has telephoned from a booth in their home town, and are hired by a carnival owner to spot pickpockets.
While helping their father search for the "Ivory Idol, " Joe and Frank discover a connection between their current case at a carnival in town, a stuffed whale dug up at a local construction site, and the "Ivory Idol.".
