Amsterdam airport has disappeared. 

          Blackmail. The mass of water in its place is the work of FFF – an Irish terrorist group who want to force Britain’s hand. 

          Subterfuge. The Dutch call in Detective van Effen – feared interrogator and intimate of the criminal Krakers gang – to sabotage the FFF’s plan. 

          Disaster. If van Effen falls and the FFF get control of the vital dyke, either Holland will sink beneath the sea or Britain will be awash with blood.