Bogart and Hepburn play two diametrically opposed personalities in this classic film set during World War I. She is a prim and proper, middle-aged English missionary. He is a gin-soaked river rat living by trading up and down the Congo River from a ramshackle old steamboat named The African Queen. They are thrown together by a German offensive that leaves them isolated and in danger of being captured and held as prisoners of war (or worse, they could be shot as spies). To escape, they must travel down the river past the Germans. What follows is part comedy, part tense drama, and part high adventure. The river and its wildlife pose as much of an obstacle as the Germans, and Bogart and Hepburn must not only learn to get along, but to trust in, and rely on, each other to survive.
This is a wonderful movie. The acting is superb (Bogie got an Oscar for "Best Actor"), the story is excellent, and the scenery is beautiful (it was shot on location). They just don't make make them any better than this, and I can't imagine any reason why anyone would NOT want this in their collection. Very highly recommended.