Never have Quiller's survival skills been so crucial as in the eerily prophetic mission code-named "Solitaire." When the body of the agent he was supposed to protect is discovered in the burnt wreck of a car, Quiller must unveil the truth behind rumors of a bomb threat somewhere in Europe. Posing as an international arms dealer, he infiltrates Nemesis, a group of deeply religious Euroterrorist fanatics who follow a psychopathic and extremely intelligent leader. Quiller's final meeting with Nemesis transpires on Pan Am Flight 905, which carries 20,000 pounds of explosives and forty cylinders of nerve gas—and has disappeared from the radar screens. Quiller alone must stop the plane and its suicidal terrorist crew from reaching their unknown destination.