A call to action leads the Hardy Boys on a roller coaster ride of terror! Frank and Joe have received an urgent message from their father: He needs their help on a case at the South Carolina sci-fi theme park, The Fourth Dimension. Soon after their arrival, however, the case takes a dark and shocking turn. Before the boys can even learn the details of their father’s investigation, they learn he’s been kidnapped! But the Hardys enter The Forth Dimension at their own risk. The search for their missing father draws them into a fight against an elusive enemy armed with rampaging robots, hurtling hovercraft, and deadly laser guns. Their only chance to solve the mystery is to execute a far-out, futuristic battle plan of their own!