I think every western did it - the regular(s) get into a stagecoach that is held up and the robbers leave everyone out in the desert with no water and no horses. The story is how the somehow manage to walk 40 miles in a couple days with no water in the desert, and how they manage to unravel secrets about each other, damaging and otherwise. This one was OK but awfully predictable. One of the passengers had been a scout and helps them find their way out and earns his redemption over the fact that he left his wagon train years earlier out there in the same desert and everyone died.