Jake, Becca, Ryan and Harriet are kidnapped by Dr Crookshanks and his accomplice, Professor Kaufman. Against their will, the gang have to jump 'into' the world’s best known adventure stories to steal important artefacts, using an incredible invention called the Nautilus. If they don't get what Crookshanks wants, what will he do to their parents? And what will Becca do without her dad's credit card?