Paranormal novelist Gideon Harlax is drawn into a battle between the forces of good, represented by alien angel Helith, and the forces of evil, represented by Helith's evil brother Asrael. Ranging from Oxford to Denmark, a North Sea ferry to an alien planet, Harlax unwittingly becomes part of an ancient plot that may result in the destruction of Earth...

After the breakdown of his marriage Gil struggles to bring up his two daughters, but his care is not enough to ward off the all-pervading power of the White Lady, a symbol of the chemicals used in food production in Britain.