A sick man, suffering from loss of memory, is identified as the wealthy Ian Denning, believed lost in the South American jungle three years before. But his wife does not recognize him - is he an imposter?

Garnett goes to West Germany to investigate a report from an ex-Luftwaffe General that planes are landing at a disused airfield. Is the General imagining things, or is there really a mystery to be solved?

Garnett has reason to believe a murderer has stowed away in the nosewheel housing of a freight plane bound for New York. But murderer or not, the man's life is in danger.