In this pilot film to the "Hawaii Five-0" television series, special law officer Steve McGarrett tracks down Red Chinese operatives and their spy ring in Honolulu.

Steve Kostain, nephew of the owner, begins working at a steel mill to learn the business from the bottom up. He rooms with a steel working family, the McNamaras, and falls for the daughter, "Red", who is already involved with another steelworker. Although he is at first has a hard time with his co-workers, he eventually wins them over, and also wins the girl.

A young daughter of poor farmers is forced by her mother to ditch her young boyfriend in order to marry an old rich neighbor but the girl rebels by becoming the town's harlot.