When Norwegian resistance leader Lieutenant Erik Bergman reports the location of a German V-2 rocket fuel plant, the Royal Air Force's 633 Squadron is assigned the mission to destroy it. The plant is in a seemingly-impregnable location beneath an overhanging cliff at the end of a long, narrow fjord lined with anti-aircraft guns. The only way to destroy the plant is by collapsing the cliff on top of it.

In the business end of a kitchen, a polyglot staff strives to cope with a superhuman task. A microcosm of the world, the kitchen looms around and encloses its workers; they include Peter, the German cook, who is in love with waitress Monica, and constantly asks her to leave her husband. The pressure of the day becomes unendurable, and when Peter realises that Monica does not mean to divorce her husband his grief and pain cause him to run berserk!