Two worlds - the scientific Proton, and the magical Phaze - exist side-by-side. Now, Mach has crossed from Proton to Phaze, switching places with his counterpart, Bane. And both must learn to survive in environments alien to their own nature.

The combined magic and technology between the parallel worlds of Phaze and Proton is not enough to save the planets from a conquering invasion. Only Mach and Bane - robot and wizard, linked between worlds - have any chance of stopping this threat.

The merged worlds of Phaze and Proton face a new threat from an invading force - leaving the fate of the two planets in the hands of Nepe and Flach, two children possessing magical powers.

In Book 2 of the epic adventure that began in Split Infinity, Stile discovers life on Proton and Phaze is getting more difficult. On Proton he's a serf trying to prove his right to exist by competing in the Great Games. And on Phaze, where only magic worked, he was the Blue Adept trying to master the powers of sorcery.

On the technological, decadent world of Proton, someone was trying to destroy Stile, serf and master Gamesman. His only escape lay in Phaze, a world totally ruled by magic. Soon he learned that his alternate self had already been murdered, and that he was next. On Proton, his fate depended on winning the great Games. On Phaze, he must master magic to survive. And if he used any magic at all, his friends were determined to kill him at once!