Emi and Polly Leto are identical twins with a shared life until Emi vanishes and Polly is left searching. Now one becomes two, and twindom becomes duplicity as myth and memory merge, forcing Emi and Polly to confront what they thought they knew about themselves, one another and the parents who made them. Behind the twins there is the creator of their souls, a woman called Sarah, a mother without whom there would be no story to be told.

From the edgy heart of London to a remote idyll on the Stockholm archipelago, this is a journey into the power of love, the damage wreaked by emotional depression and the agony of sexual deceit. It is a story of the genetic impact of nature wrestling with the heady demands of nurture, of patterns of behaviour and the cruel turns of fate.