During World War One an English adventurer, an American elephant poacher and the latter's attractive young daughter, set out to destroy a German battle-cruiser which is awaiting repairs in an inlet just off Zanzibar. The story is based on a novel by Wilbur Smith, which in turn is very loosely based on events involving the light cruiser SMS Königsberg, which was sunk after taking refuge in Rufigi delta in 1915.

The first World War is in its third year and aerial combat above the Western Front is consuming the nation's favored children at an appalling rate. By early 1917, the average life-span of a British pilot is less than a fortnight. Such losses place a fearsome strain on Gresham, commanding officer of the squadron. Aces High recreates the early days of the Royal Flying Corps with some magnificently staged aerial battles, and sensitive direction presents a moving portrayal of the futilities of war.