Harriet Vane is awaiting a second trial for the murder of Philip Boyes, the man she once loved. Despite Harriet's admission that she had bought arsenic, later shown to be the cause of Philip's death, the first jury could not agree on her guilt. Lord Peter Wimsey has fallen in love with the prisoner ...
and sets out to prove her innocence. New evidence is hard to come by and Wimsey, working against the clock, must use all his skill and cunning if he is to save Harriet from the noose...