Sam Moran is a Honolulu charter-boat captain who leads fishing expeditions in the tropical paradise. When his daughter is found murdered at the party of a wealthy young playboy, he seeks the truth about the murder.
As the railroad builders advance unstoppably through the Arizona desert on their way to the sea, Jill arrives in the small town of Flagstone with the intention of starting a new life.
Five criminals are arrested after a bank-robbery. One escapes, and the police officer in charge of transporting them arrests a new person at random to cover up for his negligence.