The magnificent story of every courageous man who has ever gone out to face death and every brave woman who has ever waited for him to return. This surging screen adventure is set at the end of World War I where a perilous Foreign Legion bid to excavate a priceless tomb. Major Foster (Gene Hackman) and his legionnaires are ordered to protect an archaeological expedition led by Franois Marneau (Max Von Sydow). Foster is opposed to the excavation of the priceless tomb in Morocco, knowing the last expedition there was destroyed. Marco Segrain (Terence Hill), on the run from the police, joins the Legion and acquires a grudging admiration for Foster. On the ship to Morocco they are attracted to the same woman (Catherine Deneuve). In Morocco, Foster battles the forces who are out to stop the expedition. Thousands are slaughtered and Marco is left to take up the cavalry of his fallen friend and commander.