While attending an amusement park under the new ownership of their friend Daisy, Joe and Frank investigate the disappearance of a patron who was last seen riding a hit attraction, an event that has threatened Daisy's family's livelihood.

Frank and Joe Hardy go undercover as part of a crew on an old commercial fishing boat; their mission is to discover why teen seamen mysteriously vanish while fishing.

When Frank and Joe Hardy put a stop to the alarming, but mostly harmless, pranks of amateur moviemaker Seth Diller, a series of more dangerous copycat pranks leads them to a criminal group called the Red Arrow.

On an ice-bound, snow-covered island, Frank and Joe attempt to solve the mystery of a boy's disappearance and the theft of a priceless collection of antique medals.