In the violent streets of a despoiled London, Alan Duval is set upon by a gang, and wounded by the poisoned blade of a ceremonial dagger. He thought he was going to die – until his life was saved by a mysterious, feral girl – whose eyes look uncannily like those of his first, lost, childhood love. Suddenly he is transported to Tir, the mirror world to Earth, where he encounters the dark and frightening creature, Granny Ddhu. Treating his wounds, she confers on him the Oraculum of the Tridedana, the gateway to immense power, and the first step in an impossible quest.
Tir has been at war for over a thousand years with forces that inflict endless pain and suffering on the people, led by the Tyrant of the Wastelands. The survival of Tir – and Earth – depend upon his success.