Watch What is My Sin (1964) Official Trailer

A village girl gets tricked by the landlord's son and gets lost in the city while chasing him. The result of this deception comes into existence, but the mother has no choice but to abandon her child. The child finds its way to a wealthy family and continues its life. One day, the child meets an old woman who had an accident in the hospital. She donates her blood to her, and the doctor realizes that the old woman's and the girl's blood types are a rare but similar group. The girl and mother recognize each other, and the story ends happily after many years.