A tribute to the U.S. 442nd Regimental Combat Team, formed in 1943 by Presidential permission with Japanese-American volunteers. We follow the training of a platoon under the rueful command of Lt. Mike Grayson who shares common prejudices of the time. The 442nd serve in Italy, then France, distinguishing themselves in skirmishes and battles; gradually and naturally, Grayson's prejudices evaporate with dawning realization that his men are better soldiers than he is.

The new commander of a Navy Underwater Demolition Team--nicknamed "Frogmen"--must earn the respect of the men in his unit, who are still grieving over the death of their former commander and resentful of the new one.