A strange idea for a comedy finds the always charming Terry-Thomas fighting a smallpox epidemic. He's a "germ detective" for WHO (World Health Organization) who finds evidence of the disease after a passenger has died on a plane from the Middle East. Along with partner Nicol, he sets out
for the oil fields. Wheeler is an American oilman detained for possible exposure to the smallpox. After two more cases pop up, Terry-Thomas links the outbreak to Deghy, an unscrupulous oilman who will do anything to control the lucrative oil business. It is revealed in a climactic ending that he
infected an important document that Wheeler had been carrying. After Wheeler's death, T...