The airport mechanic was a shade under six feet tall, and the body beneath his overalls and padded cold-weather vest was lean and athletic. The single line that bisected his strong, dark brow suggested a determined fixity of purpose, and his clear green eyes conveyed a calm, almost chilly intelligence. A woolen knitted cap covered his short brown hair. The lower part of his face was hidden behind a beard.

There was a badge on his chest. It gave his name as Steve Lundin.

The badge was fake. The mechanic’s real name was Samuel Carver.

No one in the hangar batted an eyelid when Carver unscrewed the hatch at the tail end of the executive jet and hauled himself up into the rear equipment bay for a standard preflight inspection.

This area was not reachable while the jet was airborne. It was simply a place filled with ugly but functional components, much like the basement of a building. Things like bundles of wires linking the plane’s electronic circuits, the cables and hydraulic lines that controlled the rudder and elevators, the accumulator holding the hydraulic fluid that got pumped out through the system, the pipes that carried super-heated, high-pressure air off the engines and sent it for use in the plane’s cabin heating system. None of these things were much to look at, or remotely exciting, until, of course, they went wrong.