Gangsters free one of their colleagues being escorted to prison and kill several FBI agents and local police officers in the attempt. FBI agent Melvin Purvis puts together a special squad to track down and capture the men responsible.

When her husband dies en route to America, Martha Price and her daughter Hilary are left to carry out his dream: the introduction of Hereford cattle into the American West. They enlist Sam "Bulldog" Burnett in their efforts to transport their lone bull, a Hereford named Vindicator, to a breeder in Texas, but the trail is fraught with danger and even Burnett doubts the survival potential of this "rare breed" of cattle.

A powerful rancher always protects his wild adult son by paying for damages and bribing witnesses, until his crimes become too serious to rectify.