In 1942, Paris fell. Younes, a young Algerian immigrant, makes a living by doing black market business. After his arrest, Younes accepted an offer from the French police to monitor a mosque in Paris on their behalf. Police suspect that the head of the mosque, Si Kaddour Ben Ghabrit, provided false identities to Jews and French resistance activists to cover them. In the mosque, Younes met the Algerian singer Salim Halali, and was moved by his voice and personality and became friends with him. Younes soon discovered that Salim was Jewish. At the risk of being hunted, Younes ended his cooperation with the police. In the face of all kinds of atrocities around him, Younes, a migrant worker without any political education, began to transform step by step and eventually became a fighter of freedom.