From a tribe whose way of life has not changed since the Stone Age comes a threat as old as the Dark Gods themselves.

Half a world - and thirty thousand years - away men are struck down by ancient but powerful magic.

But why? And from where?

From the cold wet streets of London in December to the sun-baked desert of Australia's outback. The Guardians - fighters against the Powers of Darkness - wage at first a losing battle, which starts on earth but reaches its thrilling climax in a world beyond worlds with weapons outside the knowledge of most of mankind.