After her husband dies en-route to America, Martha Price and her daughter Hilary are left to fulfil his dream: introducing Hereford cattle in 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. The trail, however, is a dangerous one, and even Burnett doubts the survival potential of this "rare breed."