 During a day at an airport in London, many complications arise, involving both passengers and airline crew members.Pilot Gus Randall (Anthony Steel) is a compulsive gambler who is caught up in a smuggling ring as well as a love triangle; Nick Millbourne (Robert Beatty) is the chief duty officer who wants to get back in the sky and vies with Gus for the attention of stewardess Penny Henson (Eunice Gayson); and passengers Bill Steiner (David Knight) and German Leah Rosch (Margo Lorenz) cross paths on opposite journeys; after their flights are grounded by bad weather, they fall in love.Nick and Penny also find happiness together.