Matt, a bullet lodged near his spine, must have surgery immediately. Doc is convinced he's not up to the task. However, a priest, whose own faith has been wavering, tells Doc that he must operate; if Matt should not survive the operation, it will be God's will. The priest rediscovers his own faith because of the ordeal. Meanwhile, Festus and Newly abandon the wagon with gold while freeing the horses. Sinclair's gang will have to haul the wagon themselves. Festus and Newly gamble the train can be restarted before they arrive. Doc must complete the intricate operation before the train starts up. Sinclair gets to the train ahead of the gang and finally discovers that Matt is aboard.