'Every day, haunted still by doubt, I ask myself a question which I cannot answer.

Was Rachel innocent or guilty?'

Philip Ashley has been raised by his cousin Ambrose as heir to his beautiful Cornish estate. But this close-knit world is shattered when Ambrose travels to Florence, where he unexpectedly falls in love and marries - only to die of a strange illness. Before long, his beautiful, mysterious widow arrives in England - and despite himself, Philip is caught in her spell. But is Rachel a victim, a saviour - or a murderess?