'Already loose sand had drifted over the stamped-down square which momentarily had distinguished the subaltern's grave: no there was no sign, no mark, no indication whatsoever. There had been, here, eleven men. Now ten rode away' In the Mesopotamian desert during World War I, the leader of a British patrol is shot and killed, by an unseen enemy. The officer is the only one who knows their orders and has not told anyone else where they are located...