A deserted airfield - a plane with stolen gold - and in the hut the tea is still warm in the teapot. This is the mystery Delaney has to solve when he flies to the emergency landing strip in the African bush.

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?