Dr. Henry Jekyll is an irreproachable doctor, dedicated to his patients and actively committed to scientific research. Intrigued by the opinions on the double nature of human beings of his father-in-law, Sir George Carew, he begins a series of experiments which will soon lead him to discover a serum able to separate good from evil. Jekyll does not hesitate to test the serum himself: he transforms into his evil double, Mr. Hyde. In order to musically express the great theme of the dualism of reason and impulse, the duo Di Benedetto and Minguzzi experiment with the timbre and sound ambience created by their unusual instruments.