Room Thirteen might be the smallest bedroom at Earls Boarding School, but newcomers Jack and Simon soon discover that there's far more to their new room than meets the eye when they discover a hidden portal - a portal which leads to another school in the fifth dimension!
The boys quickly find themselves involved in a variety of wonderful and exciting adventures when they start using the portal and meet some of the other-worldly students who are studying there. They make many new and unusual friends including an inept witch, a student from Venus, two ghosts, a nutty gnome and even an angel.
However, things take an unexpected - and frightening - turn when a ruthless and bloodthirsty vampire from the alternative universe also discovers the portal and threatens to bring terror to the human race. It is left to Jack, Simon and their new friends to find a way of saving the world from the wrath of the vampire, the fearsome Gladstone Gore.
Yet how will they manage...when the invisibility potion is running dry, the apprentice Witch spells disaster by turning friends into mice, and trainee shape shifters just can't seem to master their skills? And on top of all this the two resident bullies at Earls are constantly prowling the corridors!