Lewis Gilbert's classic comedy drama portrays the antics of a British Army Searchlight Squad during World War II. Lieutenant Ogleby (Ian Carmichael) has his work cut out to keep his "legionnaires" at their post and not rampaging through the local countryside. The McGaffey brothers (Benny Hill and Tommy Steele) create havoc with their light-fingers and light-loving with the local girls, whilst Smithy (Johnny Briggs) pines for his sweetheart.