Fenton leaves town to search for the missing Rupert Khan. Joe delivers a message for a shady stranger, and Frank connects Laura to a local legend and a mysterious object pulled from the sea.

A terrifying man tracks Joe to the carnival, where a curious new trinket grants Joe incredible luck. Frank tries to find out why Laura was so interested in a decades-old local mine collapse.

Joe tries to cover up his connection to a criminal and ends up learning his identity. While following Laura's investigative footsteps, Frank learns his Grandmother is lying to him.

After an attempt to lure out the buyer of a twice-stolen object, Frank and Joe find themselves pursued by someone they believed to be dead. Their friends are welcomed onto the team.

Frank and Callie grow closer during an entrance exam to a prestigious school, only to find more secrets. Joe and Biff decide to hide his lucky charm from a threatening pursuer. Fenton takes another step in his search.

Frank and Callie look behind the veil at Rosegrave Prep and learn that Laura's investigation started in high school, while Joe tries to prove their conspiracy has a local police connection.

The boys head back to school, but Frank and Callie have different takes on the new girl. Frank learns more about young Laura, while an old friend returns to offer Joe information...for a price.

Frank and Joe exchange truths with their Grandmother and find a long-hidden secret in her home. Fenton finds what he's looking for. Meanwhile, other forces work against them all.

Taking a step farther than their mother did and learning the nature of the object at the heart of the mystery, Frank and Joe's unity fractures over what to do next. Tensions between Chet, Callie, Frank and Stacy reach a peak.

Trapped and lost, Biff and Joe's friendship is tested. Frank can only help find them by revealing too much to people he can't trust.

Regaining possession of something long-lost, Gloria reasserts old power. Fenton returns and is stunned to see his sons in the middle of secrets that he, too, has uncovered. Frank enters an uneasy alliance, and climactic events are set in motion.

The Hardy boys and the gang embark on a daring mission to finally uncover the truth... but in revealing the truth could they unleash a dark power beyond their control?