In North Africa, Captain Valcázar and Lieutenant Herrera's harka, great friends, stands out for its heroism in actions. The wife and the sister of a dead Captain travel to Morocco. At the time, Herrera falls in love with the sister in law, Amparo, who wants to return to Madrid. So does the lieutenant, but soon learns the harka has been undone in combat and the Captain Valcázar died with it. Herrera runs to take charge of the harka to reorganize it.