You are stalking into a fortress that you know may be a trap. Escape to an earlier day in the Sahara of Africa. A small band of Legionaires, adventurers are in search of valuable sapphires. They try to keep their treasure hidden as the soft, green gents deal with life in the Foreign Legion. Tougher men than them die.
The men are soon battle toughened, and dangers are a constant companion. After years of struggle, priorities take on new meanings. Things like gems are not so important. The ending is tragic, but good if you consider the lesson learned for the survivors.