Boarding an airliner headed from New York to London, writer Jane Forrest knows it will be a turbulent flight. An electrical storm stands between Jane and London. When a spectacular surge of lightning illuminates the clouds below them and the airliner is knocked off course, Jane turns to the dashing, intelligent Sir Richard Barton in the next seat. As dawn breaks, Jane realises there are no lights on the ground and the radio is jammed. When the airliner is safely landed on a deserted airfield they find cars abandoned and a mysterious lack of people on the deathly silent streets of Glasgow. Believing she will be safe in the arms of Sir Richard, it's not until he is mysteriously taken ill that Jane questions her love...