Why do You Remain Silent? (movie, 1966)

Rasim, a young mechanic, meets Surayya and falls in love with her. But he is dragged into Shirmammad's wrongdoings; Shirmammad is Surayya's father and the leader of a gang of poachers. Realising his fault, Rasim tries to convince Surayya to stop trafficking in stolen fish. After a long period of reflection, Rasim becomes aware that he cannot go against his conscience, even for love's sake.