A documentary presenting the story of a monk and exorcist, Matteo da Agnone. Murder, Love and Forgiveness. Evidence from the late 16th and early 17th centuries and testimonies that will not leave you indifferent. Who was Matteo? What do the archives of the town of Agnone hide? How did the Vatican react to the story? These questions are answered by Fr. Cipriano de Meo, Fr. Nazareno M. Galullo, a charismatic priest, and Prof. Maria Cristina Melloni, an Italian history researcher.