Brothers in Blood(1975)

Two brothers accept to marry their sister Maryam to their friend Hassan. But she is in love with another guy Hashem who is away. In her wedding night she lies to the groom and escapes to Hashem's mother house. The older brother gets her divorce from Hassan and goes after her to find her. On the other hand Hashem is back but with a wife. This put them all to confront each other.