Arun Khanna is an army intelligence officer working for the Indian Secret Service agency Research and Analysis Wing (RAW) who has been sent to the Indo-Pakistan border in Kashmir. Under the identity of Major Batra, he sets up a spy network to obtain information about Pakistani terrorist activities across the border. In a nearby village, he meets Reshma, an orphan. Reshma joins the network to help Batra, and they fall in love. He reluctantly sends her into Pakistan to work as an undercover maid in Colonel Hidayatulla’s house. Hidayatulla is associated with ISI head Isaq Khan and terrorist Maulana Azhar.
Reshma begins passing information to Batra. Khan, Azhar, and a group of nuclear scientists meet Hidayatulla’s house, where they reveal plans to make a nuclear bomb for a terrorist attack in Kashmir. Reshma is exposed; she escapes and is chased but is saved by Batra and returns to India. Batra proposes marriage. Their engagement ceremony is cut short when terrorists attack. Reshma goes missing after falling into the river, and Batra is presumed dead.
Batra realizes Khan and Azhar are responsible for the attack. He fakes his own death and plans to infiltrate their terrorist network. In disguise, he follows Khan and Azhar to Canada and discovers they are planning to create a nuclear bomb. Reshma is found alive on the shore in Lahore, Pakistan, where she is rescued by Salman. She loses the ability to walk after learning about the deaths of Batra and her parents. Salman takes her to Canada for treatment under the care of doctor Shaheen Zakaria, the daughter of Muslim fundamentalist Mr. Zakaria, an associate of Khan. In a shopping mall, Reshma finds a muffler she had knitted for Batra, and realizes he is alive and in Canada.
Batra changes his identity to that of a nuclear scientist named Wahid. To infiltrate Zakaria’s group, he wins Zakaria’s trust and marries Shaheen. Reshma sees Batra as Wahid at his wedding with Shaheen and recognizes him. Batra tells Reshma they cannot be together because he is now married to Shaheen. Reshma is heartbroken and returns to India. Overhearing their conversation, Shaheen learns the truth and is heartbroken. Batra tells Shaheen the truth about her father, but she does not believe the news about her father’s terrorist links.