Nagina is 1986 Hindi film, produced and directed by Harmesh Malhotra, written by Jagmohan Kapoor, and starring Rishi Kapoor and Sridevi in lead roles.
The films music was provided by Laxmikant-Pyarelal, with lyrics by Anand Bakshi, and classics like, Main Teri Dushman.
Rajiv [Rishi Kapoor] comes from a wealthy land-owning family, and lives in a palatial home with his mother, who would like him to get married to a beautiful young woman named Vijaya Singh, the only daughter of Thakur Ajay Singh [Prem Chopra]. Rajiv, however, is in love with Rajni [Sridevi], who is an orphan without connections. When Rajiv informs his mother of his intent to marry Rajni, she refuses to give her blessings, but relents after a favourable meeting with Rajni. The marriage is arranged and they enjoy their wedded bliss - that is, until the arrival of Bhairo Nath [Amrish Puri], a sadhu capable of controlling snakes. He informs Rajivs mum that Rajni is a shape-shifting venomous snake who has married Rajiv to avenge the death of her spouse during Rajivs childhood. What Rajivs mum does not know is that Bhairo Nath has a secret agenda in entrapping Rajni, a secret the knowledge of which will shatter and change their lives forever.
A commercial success, the movie was widely appreciated for its screenplay, dialogues and direction.
This movie was followed by a sequel in 1989 called Nigahen: Nagina Part II.
Source : Nagina Wiki Page