The Laramie bank has been robbed by Vernon Kane who killed a popular deputy. Slim Sherman trails the bandit into the desert taking half of Jess's water who turns back. He catches up with Kane wounding him in the wrist but Kane escapes. Kane then joins company with Jack Farnum, a gambler, and his long suffering wife, Deborah who are on their way to California looking for gold. When Kane comes upon them, one of their horses has been put down stranding them and he claims he's being trailed by a desperado who robbed a bank and killed a man west of them. They used Kane's horse to make a team of horses to pull the wagon. When Slim comes along, Kane's glib tongue has the couple, especially Jack, who wants to continue west siding with him against Slim. Slim is able to force the small band to go back to Laramie but it's a desperate fight for survival with little water, no rest and little help. Who will survive?