When Kate Exeter is kidnapped on the shore of the Thames, Commander William Monk is enlisted by her desperate husband to save her. Kate's captors are demanding a ransom for her safe return and Monk and his most trusted men must arrange a secret handover in the dark slums of Jacob's Island. But on the night someone betrays them and a brutal skirmish breaks out, leaving death and destruction in its wake. The new Victorian mystery featuring William Monk.