Nagina (1986)

Rajiv as a kid is bitten by snake while roaming in the forest but a snake charmer Bhaironath manages to save his life by killing the snake. Years later Rajiv returns from London where his mother wants him to get married to Vijaya.Rajiv comes across a beautiful Rajni an orphan and falls in love with her but his mother objects as she is an orphan later agrees for their marriage .Rajiv and Rajni get married and are living happily until Bhaironath arrives and tells Rajiv's mother that Rajni is actually a snake shifting snake who has come to revenge death of her lover who had bitten Rajiv in childhood.But Bhaironath's true intentions are to capture Rajni as she knows about a hidden pearl which can make him powerful.