A story about the Spanish Civil War based on true events

Summer, 1938. A sniper´s shots end the life of two militiamen. Shortly after, Captain Matí­as and his unit discover that the killer was a teenager who, set on avenging the death of his falangist brother, is still holed up in the apartment he fired from. Some of them want to go up and put an end to him, but the captain wants to give him a chance.