A series of adventures begins for the Hardy boys after they sail their-ice boat to the desolate and inhospitable Cabin Island.

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...

The search for a stolen boat leads the Hardy brothers to Mexico where they become involved with a band of Indians and a strange smuggling operation.

The Hardy boys embark on another puzzling mystery when they try to discover who is stealing rare collections of ancient pirate treasure and smuggling them out of the United States.

When thieves hijack a collection of stuffed animals from a country auction, Frank and Joe Hardy pursue the getaway car and are drawn into a thrilling mystery. The recently acquired interest of their best pal, chubby Chet Morton, in taxidermy as a hobby adds fresh twists to the puzzle.

Their efforts to recover a stolen ancient chess piece lead the Hardy brothers to Hong Kong where they help smash an international criminal organization.

A chance meeting with a stranger on the road provides the Hardy brothers with a clue to a gang of local burglars.

The Hardy boys' investigation of a museum robbery in England arouses the anger of a coven of black witches.

Frank and Joe Hardy are investigating a mysterious old house high on the cliffs above Barmet Bay when they are frightened off by a mysterious scream. The boys return to the apparently haunted house and make a connection between the place and a smuggling case their father is working on. When their father goes missing, they start-out investigating the secret caves beneath the house but soon confront the smugglers.

Teenage detectives Frank and Joe Hardy investigate a case of counterfeiting.