Mahira Mirza is a young girl from Kashmir, whose parents Sharif and Aayat were killed in a terrorist attack and she got separated from her brother. She gets adopted by Saras and Minal Kotadia, who changes her name to Sejal Kotadia. While, her brother Fareed is adopted by Shera and becomes Abhishek Singh.
Yohan Nanda, is the son of rich businessman Arun Nanda, his mother Aarti died when he was young and he hates his step-mother and aunt Veera Nanda. He lives with his brothers Shail and Krish, sister Drishti and sister-in-law Shalini. Veera in reality is a terrorist and runs a group named "Mission Azaadi".
Sejal eventually join RAW with the help of S.K. and Tanha. She enters the Nanda mansion in order to spy on Yohan, who is suspected. She eventually learns that Yohan is innocent and Veera is the real culprit. She also learns that her brother, Abhishek is married to Yohan's sister Drishti. Abhishek loses his life in a mission to avenge his family's death, leaving Drishti in deep shock. She later give birth to Fareed's(aka Abhishek) son Aditya.
Veera makes her assistant Ahana enter the Nanda house as fake Mahira. They together prove Sejal as a terrorist and she is arrested. During court's hearing, Sejal's police van is forced to fall off the cliff by Ahana and Sejal is presumed dead.
6 months later
Sejal disguises as Paro and is pregnant. She re-enters the Nanda house faking memory loss. With her constant efforts, Yohan finds out that his mother was killed by Veera. They also found that Veera and Ahana were giving wrong medicines to Drishti. They together decides to expose Veera.
Veera tries to kill Shalini when she finds out her truth. Shalini is however, saved by Yohan and Sejal. Veera plans to kill the Nandas in a blast during Ganpati. But, Sejal saves everyone on time. Veera is exposed and is arrested by SK. Yohan is arrested on false charges of rape, through a plan made by Ahana and Veera.
During the court hearing, Yohan proves himself innocent, but Ahana turns the table around. Veera escapes police custody with Arbaaz's help and SK sir is killed by a bomb planted in the court. Sejal promises to catch Veera. Sejal is finally able to capture Veera who is killed while escaping. Ahana and Arbaaz are arrested.
Sejal is awarded for her bravery. She later gives birth to a baby girl, Hichki. Yohan is asked by Tanha to join as a spy. He and Sejal are assigned their new mission in Lucknow. The show ends on a happy note with Sejal, Yohan and Hichki enjoying their family time.
