Timber wolves, a Rocky Mountain blizzard, and a mine cave-in are only a few of the perils Frank and Joe Hardy encounter during their search for the principal members of a notorious gang responsible for a payroll robbery. In the old Montana mining camp of Lucky Lode, the young detectives puzzle over a series of mysterious events. A piano-playing ghost haunts the long-abandoned dance hall. Eerie blue lights flash from the hilltop cemetery in the dark...

A bratty prince and his whipping boy have many adventures when they inadvertently trade places after becoming involved with dangerous outlaws.

Asked to locate a stolen necklace of unusual value, Nancy soon discovers that strange and dangerous people are responsible for the theft.

A rare Chinese vase is stolen from a pottery shop. Nancy and the owner of the shop feel that locating "the leaning chimney" will provide the clue to the vase and other stolen articles.

While investigating a case of sabotage at a dog show, Nancy and her friends are drawn into an undercover international operation in pursuit of a jewel smuggler.

Accused of stealing the god of love's bow and arrow, Aru has ten days to find the real thief or risk being kicked out of the Otherworld.