When Tommy and Tuppence Beresford move to a quiet English village, they are looking forward to a peaceful retirement. But, as they soon discover, their rambling old house holds dark secrets. Who is Mary Jordan? And why has someone left a code message in an old book about her 'unnatural' death? Once more, the couple's ingenuity and insight are called for as they are drawn into old mysteries and new dangers.

Originally published in 1973.