A man returning home after having fought in the Civil War discovers that corrupt politicians have taken over the county and are terrorizing and shaking down the citizens. He dons the costume of his ancestor, the famous Zorro, and sets out to bring them to justice.

The arrival of the telegraph put Pony Express riders like John Blair and his pal Smoky out of work. A race will decide whether they or stageline owner Drake get the government mail contract.

Wishing to dispose of his wife, psychiatrist Dr. Elliott makes his patient Nina think that she suffers from a compulsion to kill. He drugs Nina, murders his wife and leaves evidence that points to Nina. The latter, pre-conditioned by Elliott, also thinks she is guilty.

When his family is killed by Indians, a bitter cowboy turns into a ruthless hired gunman. Unbeknownst to him, his son had survived the attack, and is now a lawman. The son, not knowing that the killer is his father, is assigned to bring him to justice.

One of the passengers on a train to Tombstone decides to rob it of the $250,000 it is carrying.