Veteran gunfighter Tom Dix and his partneer, retired lawman Dan Shaw, are taking their prize bull to California to put it up for sale. But before they set out on the freight train from Cheyenne, things go wrong. Accompanied by Wild Bill Hickock, an old friend, they soon discover that the journey will not be smooth. Hickock's enemies want revenge and Tom Dix must rely once again on his gun skills if they are to survive.