In their third adventure, ten years had gone by in the real world for sibling mages, Mystic and Sage. Neither have any memory of their previous two adventures. When Mystic visits the Rollright standing stones in Penzance on a whim, his memory stone is charged once more. Zola, their psychic gecko, frantic by this time, is now able to speak to Mystic at last. Plunged back into the gaming world, the mages dodge flying dinosaurs and discover that they have another sibling - or a half one, anyway. Sage learns something profound about herself, putting her whole life in a new perspective. On their main quest, to complete this broken level, hunting for the canister, containing a single particle of anti-matter, they have to compete with stone-age hunter-gatherers, to win it back. Will they get it back in time, before the battery runs out, or will it go boom, obliterating the whole world and all of them with it? Who exactly is Upton, and who said taming a dinosaur was easy?