The emerald ranks up there with the four top gems in the world: diamond, ruby, and sapphire. It is alleged that it brings blessings of peace and serenity to its owner. The book is set in the State of Coahuila, Mexico, where a boy finds an emerald. It is an extraordinary influence in his life. He becomes the only youth in his village in San Pedro to ever go to a university. After graduating in electrical engineering, he wants to do something for his village. With the aid of the governor, he builds a wind turbine in his village, which changes the lives of the people there. Later he is appointed by the governor to spearhead the building of wind turbines in other villages.