On the night Brian Bishop murdered his wife he was sixty miles away, asleep in bed at the time. At least that's the way it looks to Detective Superintendent Roy Grace. Has someone stolen Biship's identity or is he simply a very clever liar? As Grace digs deeper behind the façade of the Bishops' outwardly respectable lives, it becomes clear that everything is not at all as it first seemed. Then he digs just a little too far, and suddenly the fragile stability of his own troubled, private world is facing destruction.