The veteran was injured in saving Dana's father during the war, and shrapnel in his brain caused him to lose his memory intermittently.In order to repay his kindness, Danu asked his son to take the veteran back to take care of his old age, but the old man was lost due to Mu Sheng's negligence.All the villagers of Ivory Mountain were dispatched to find the elderly. In order to praise everyone's virtue of being helpful and mutually helping each other, the village established the Ivory Mountain Assistant Group and awarded everyone the title of "Good People in Ivory Mountain".The old man's memory was confused and returned to the war era. The villagers accompanied him to act together to help him find his memories, and also found his comrades who had been missing for many years, so that the old man could fulfill his wish.During this process, everyone felt empathetic and experienced the entire military career from joining the army to resisting U.S. aggression and aiding Korea. Everyone felt like they had become a soldier and had different growth.At the same time, it also makes everyone realize that without the bloody battles of revolutionary ancestors, there would be no peace era today. Let us learn to cherish today's hard-won happy life and learn to be grateful.