The House of All Faith is now a major world religion on a par with Islam and Christianity but the Design - the underlying principle of Divine conflict - ensures that its enemies such as the fascist Citizens Party and the Sharpe Foundation, rise up to challenge the House both politically and financially.
The Book of All Faith, the vast House A.I. system, has embarked on the Great Revelation - the mathematical proof of the Design and hence the existence of the Creator. The sinister trillionaire, Albert Edward Maeth, has set up the Foundation with the aim of destroying the Book along with the House and their Blessed Prophet - and anyone else who gets in his way.
Two years after Digwell Street, Gemma Lewis has recovered from her dreadful injuries and the Lewises and their friends have enjoyed a relatively peaceful two years grieving for the loss of Gemma's younger sister, Tamsin. Gemma realises that all her family and friends were meant to die at the Transcending and in Digwell Street becaude the Design, having created them to destroy the Aberration, still wants to remove them from the scales of the Celestial Balance.
At Cath Palug, Tamsin Lewis reappears in the very place she was killed with no memory of her missing two years. The trouble is, she's a Changeling, sparking another wave of fear and hatred against this remarkable family and their friends.
With the Design creating powerful enemies in both the present and the future, the Changeling is their last and only hope.