Lazzaro, un joven campesino de excepcional bondad, vive en La Inviolata, una aldea que ha permanecido alejada del mundo y es controlada por la Marquesa Alfonsina de Luna. Allí, la vida de los campesinos no ha cambiado nunca, son explotados y, a su vez, abusan de la bondad de Lazzaro. Un verano, se hace amigo de Tancredi, el hijo de la Marquesa. Entre ellos surge una amistad tan preciosa que hará viajar a Lazzaro a través del tiempo y lo llevará a conocer el mundo moderno.
Lazzaro, a young peasant of exceptional kindness, lives in La Inviolata, a village that has remained far from the world and is controlled by Marquesa Alfonsina de Luna. There, the life of the peasants has never changed, they are exploited and, in turn, they abuse the goodness of Lazzaro. One summer, he becomes friends with Tancredi, the Marquesa's son. Among them arises such a precious friendship that will make Lazzaro travel through time and take him to know the modern world.