Searching desperately for her, he stumbles on a Dorset churchyard full of the gravestones of dead Esguards. He also meets a psychotherapist, Daphne Sanger. She, too, is looking for someone -- a former patient who has come to believe she is the reincarnation of a Marian Esguard who lived in Regency times and who, it emerges, may have invented photography ten years before the great Fox Talbot! But if so, why is she unknown to history? And.where is the woman he met in Vienna?

Ian sets out to solve a mystery that may be 170 years old. At the end of his search a trap awaits him. The twist at the end of Caught in the Light is Robert Goddard's most cunning to date.