Young widow Sarah Talbot is trying to find out why her stepson, while in Paris, was brutally murdered by unknown persons. Official bodies were unable to shed light on this issue, much less bring the perpetrators to justice. Finding herself in a hopeless situation, Sarah turned to British Parachute Sergeant Sean Egan for help, after which the pair traced a chain of tragic events, moving from London to Paris, then ending up in the fortress of a Sicilian mafia don and, finally, in the estate of an influential Ulster politics.