A celebrated painter receives a visit from a cardinal's assistant, who informs him that his mother could become a saint.
Benedetto is a child who came out of an accident uninjured on his first communion's day. The people of his village attribute that to a miracle and made him undergo a strict religious upbringing. That fact will determine his life, which will be affected by inner torment caused by the confrontation between sexual desires and sacrifices of faith, sin and grace.
A beautiful girl Rosina lives In Rome. Her husband is strong as a bull and jealous as Shakespeare's Othello. Once the husband of Rosina kills a wealthy aristocrat, who sang the serenade to his wife, and now he is hiding from justice.