The DH Comet is the first jet airliner and the pride of the British Overseas Airways Corporation. But on January 10, 1954, BOAC Flight 781, enroute from Rome to London, explodes catastrophically and crashes, killing 35 people. The investigation begins, but when South African Airways Flight 201 crashes exactly the same way taking another 21 lives, all Comets are grounded and the investigation takes a step forward.