Gavin Heath, a British immigrant, returns to Medicine Bow as a wealthy man three years after his ranch there went broke. He has come to celebrate his new wealth. He is a troubled man due to showing cowardice in battle for Britain as a youngster and for abandoning Trampas in a previous fight. His old ranch is almost a duplicate of the battle site where he failed. While revisiting it he is bitten by a foaming dog so they suspect he has contracted rabies as a second man is in the final stages of the disease. Gavin's mood switches to dark back to light hearted as he tries to make the best of his last thirty days. Renegrade Indians break out of jail with Trampas as a hostage and hold up at Gavin's old ranch. The doctor informs Gavin he does not have rabies as the dog was poisoned and about Trampas' situation. Gavin returns to where Trampas is being held under deadly crossfire. Gavin decides this time he will complete the charge he failed in before as a youngster.