Dioscuro, governor of Scandriglia, is willing to do anything to get to the Roman government. His daughter Barbara, instead she is disinterested in everything and continued her studies in astronomy from Polycarp and along with her friends: Giuliana, Tito, Crio and the soldier Claudio. With them she will starts a spiritual journey that will totally change her life, also marked by the death of her mother, making the Christian faith its raison d'etre. All this will bring it into conflict with the government, including the prefect Marciano and especially with the father who does not share her choice and that she had not predicted this future course.