The Hardy Boys look into shady occurrences at the Willis Firth Academy, a private boarding school in New England, where the fraternity brothers of Gamma Theta Theta struggle with dangerous problems and rivalries.
Frank and Joe travel to California to determine who is trying to sabotage the new X Games theme park, Galaxy X, but numerous suspects make it a difficult case to crack.
Frank Hardy escapes the underground bunker where he was kept with a group of kidnapped children who had disappeared while camping at Misty Falls State Park in Idaho, and Frank and Joe Hardy investigate the case.
Frank and Joe Hardy are suspicious of Max O' Malley, a new kid in town who claims to be a magician, and when Mrs. Briar's prized show dog arrives and Charlie begins to disappear and reappear, Max becomes the prime suspect.
Agents Frank and Joe Hardy investigate the disappearances of eight children taken from the same campsite that was originally dismissed by the authorities as animal attacks.
Frank and Joe are the most promising contestants in the annual Junior Bike Race in Bayport, but when Frank accidentally runs over a nail a blows a tire, his bike disappears and everyone becomes a suspect.
Frank and Joe Hardy are brought in by A.T.A.C. agents for a surprise party for their father, Fenton, and attempt to foil the Noir Sisters' sinister plans.
Frank and Joe must figure out who would want to make death threats against a high school talk radio host, but in order to catch the culprit, they have to keep the host alive.
Joe and Frank Hardy are asked to protect five children of a visiting dignitary while on a field trip to the National Library of Education in Washington, D.C., but what the Hardy boys thought would be an easy assignment turns into a major problem.
