An insurance detective encounters numerous surprises when he is assigned to investigate a meticulously-planned train robbery in Arizona.

Luke Ram seeks revenge against the white renegade who lead a Sioux raiding party against his father's stagecoach way station, killing all the inhabitants except himself. He's joined by his mining partner, young Sam Weller, not realizing that they man they seek is Weller's father, in whose gang Sam rode as a young man.

A group of four outlaws led by Abel Dragna Fraserville decide to settle in a small, civilized and peaceful town of 1,200 inhabitants in which even the sheriff, does not carry weapons. Soon the gunmen begin to make all kinds of misdeeds against the impassive gaze of the sheriff whose attitude is misunderstood by their neighbors.

The plot concerns a Key West charter boat captain persuaded to help smuggle Cuban refugees to Florida. When a refugee is killed while escaping, he loses his license and becomes involved with a married woman, whose jealous husband wants him dead.