The story opens with a Dakota, whose crew is engaged on a meteorological survey, flying over the Arctic. Suddenly the wreckage of a plane and a moving human figure are spotted on the ice below. Rupert Royce, the meteorologist on board, volunteers to parachute down to investigate while the Dakota returns to base to organise a rescue expedition. He lands safely to find that there is one survivor of what proves to be a Russian plane. But, unknown to Royce, the Dakota crashes on its return journey and the whole crew is killed. As a result, his whereabouts are completely unknown to the outside world; all the authorities know is that his body is not found in the Dakota's wreckage. (Source: 1962 Hamish Hamilton Edition)