Shortly after independence India faces terrorists attacks in Assam, resulting in many deaths and casualties. A group of concerned citizens, who are not connected with the Government, decide to do something to stop this carnage. One of the group member Salim is already at work in Beirut, his cover is blown and he is shot dead. Now Sunil Mehra (Dharmendra) must travel to Beirut and take over from Salim. Once there, he meets a former flame, Meenakshi Mehta (Mala Sinha), and also a female admirer by the name of Zenab (Zeb Rehman). The terrorists are headed by a man named Syed (Sajjan), who deputes one of his assistants, Madame (Lalita Pawar), to spy on Sunil's dad, Diwan Chand Mehra (Nasir Hussain), by posing as Mehra's daughter (Kumkum)'s aunt, forcing her to obey by abducting her son, Babloo, and holding him captive. Soon Syed and his associates, including Doctor X (Jeevan) and Captain (Madan Puri) find out all secrets of Mehra, as a result of which Sunil is trapped and held by Syed. Then Diwan's world is shattered when Meenakshi telephonically informs him that Sunil has been killed...