Zafar and Najma want to marry but Zafar's father fixes his marriage with another girl. He agrees to do so because of his father's deteriorated condition. On the wedding night, when he is on a voyage with his bride, a storm causes many people to go missing and some die. At that moment, Zafar's bride changes as both of them had not seen their partners before. The girl with Zafar (apparently his bride) is revealed to be Shabnum and was married to a friend of her brother.
Zafar tells no one about this mishap and even Shabnum doesn't realize it. When Najma feels heartbroken upon learning that Zafar has married. When Shabnum realises that the person she is living with is not her husband, she escapes from his house and meets with an accident on the road. The woman in the car takes her to hospital where Zafar also comes to find her. She states that her name is Mumtaz so that he couldn't access to her. The woman takes her to her house where she lives with her son who is a doctor۔ In her house, it revealed on Shabnum that her son is the same person whom she married. She doesn't disclose this because she thinks that no one would accept her after living with an unknown person and everyone will inquire the proof of chastity. She lives there as Mumtaz and one day, her brother comes there after being blinded by the storm. Pervaiz operates on him, restoring his sight.
Najma becomes ill due to heartbreak and Dr. Pevaiz comes for her checkup regularly. Due to an understanding between them, their mothers decide to fix their marriage to which they both deny but later agree due to constant pressure.
When Pervaiz sees her sister Shabnum, she tells her story to him. Dr. Pervaiz who stands near says that she needs no proof. Najma flees from the wedding but when she reaches home, Zafar who comes there to prove Shabnum's innocence marries Najma.
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