Cambridge 1933. On All Hallows Eve in a candlelit pew in ancient All Hallows Church Doctor Adelaide Hartest witnesses a strangers dying moments. Adelaide is just in time to hear his final confession that he has plunged the dagger into his own chest and that his death will be a suicide despite its suspicious appearance. But his confession isnt enough to halt an investigation. The victim it is revealed is known to Scotland Yard and his death is a matter of national concern. Assistant Commissioner