The flaw in [the plotting of "Plenty"] becomes apparent fairly early. A British commando comes down, fighting to disentangle himself from his parachute, in occupied France during World War II. He is almost immediately looking directly into the barrel of a pistol. It is held by a nervous girl in a trench coat (Kate Nelligan) who is as British as he. She is working with the French Resistance and, once she has accepted his credentials, she is able to give him vital tips on avoiding the Gestapo. As their hurried meeting is about to come to a close, she does an odd, impulsive thing. Grateful to see a compatriot whose name she doesn't and must not know, exhausted from her labors and rattled by tensions, courageous and proud and still not at all eager to die, she lurches into the young man's arms, clinging to him awkwardly, the...