After capturing a German boat off the coast of South America during World War I, two officers in the British navy battle the enemy aboard a convoy cruiser, merc

After capturing a German boat off the coast of South America during World War I, two officers in the British navy battle the enemy aboard a convoy cruiser, merc

As World War I draws to a close, two young American officers engage in a series of missions which deal crippling blows to the German enemy.

Hal and Chester undertake a number of missions in Europe just after the Americans enter World War I.