In 1999, in the old medina of Casablanca in Morocco, a young man Malek fascinated by the lute, decides to move in with his uncle Amir. To teach him the subtleties of the lute, Amir, the master of music, promises him to reveal him the secret of the fifth string and gives him the example of Ziryab, an exceptional musician. But very soon Amir realizes the talent of his nephew and can't bear it. During his education, Malek meets Laura, a young musician, who gives him the sufficient energy to pursue ...