The relentless struggle of war time wreaks havoc on the sexual mores of two war-weary lovers in this provocative drama starring William Holden and Sophia Loren. Living in a small London flat during World War II, Stella (Loren) has fallen into a series of unhappy relationships with men. Over the years she has allowed the key to her apartment to pass from sea captain to sea captain. The cold reality of her of her intimate "services" has caused Stella to develop a callous attitude towards her lovers. But when Canadian captain David Ross (Holden) is taken to her apartment by an old friend, Stella finds herself embraced by an unknown feeling: love. She promises Ross that he is her last, permanent lover. But in wartime... keeping promises can be the most heart wrenching struggle of all.