Can Lord Peter Wimsey prove that Harriet Vane is not guilty of
murder - or find the real poisoner in time to save her from the
gallows? Impossible, it seems. The Crown's case is watertight. The
police are adamant that the right person is on trial. The judge's
summing-up is also clear. Harriet Vane is guilty of the killing her
lover. And Harriet Vane shall hang. But the jury disagrees.