Deep beneath the surface of the world there is a system of tunnels, caverns and passages. This is where The Fallen, a race of powerful and evil demons, live. Their one purpose is to regain the surface of the world, destroy the human race and take over the whole of the Dreamscape. Two people stand in their way: Dan, who carries the Sword of Dreams and Polly, wielder of the Sword of Light, are the only ones who can prevent the Fallen from achieving their goal. Aided and directed by the Controllers, they are becoming weary of the battle and can see no way they can win. They are given new hope when the third sword, the Sword of Darkness, is found on one of the other Dreamworlds and must find a way to bring its owner into the struggle. If they can combine the three weapons they can create the fabled Triple-bladed sword, which is reputed to be more powerful than any other weapon in the Dreamscape, but time is running out. The Fallen are breaking through in ever increasing numbers and when the final confrontation draws near, Dan is destined to face enemies from the past as well as new foes. Can the heroes prevail, or will the Fallen succeed and wipe out the human race?