Frank and Joe Hardy return to detective work when a classmate goes missing.

Joe suspects Dennis’s girlfriend, Lucy, is hiding something about the night he went missing, and Frank realizes The Eye is trying to show him something about the case.

When Frank is led to believe a local recluse is their prime suspect, the team attempts a risky break-in to retrieve the video camera Dennis lost in the woods.

It’s a waiting game as Callie tries to repair Dennis’s damaged videotape, and the whole gang attends the annual Demon Night drive-in.

The gang races to stop a potential bombing at the Demon Day Parade, while Fenton makes a shocking discovery of his own.

In the aftermath of the bombing, the team realizes Wilt’s may not have been the intended target.

Joe conspires with J.B. to steal the relic from Stratemeyer Global and get the power out of Frank, but The Eye has other plans.

With Frank missing from the school dance, Joe and the gang must race against time to locate his whereabouts and stop the Shadow Man from completing his ultimate plan.

When the gang learns the location of George Estabrook’s hidden Codexes, they must enlist the help of an unlikely ally to retrieve them before anyone else.

Betrayed by one of their own, the gang struggles to understand the meaning behind George Estabrook’s map and faces a shocking quid pro quo.

After a shocking blow, the gang must divide and conquer to determine the identity of Deep Voice and get The Core back.

The Hardy Boys get what they want most and must race to deactivate The Core before it’s too late.

As The Core’s true purpose is revealed, the Hardy Boys and their friends must band together to save themselves, and the world, from an unheard-of technology that could forever change life as they know it.