Nigahen: Nagina Part II (1989)

After the tragic deaths of his son Ajit and daughter-in-law Rajni, Raja Saheb decides to educate his granddaughter Neelam in the city. Years later, Neelam has grown up and returns temporarily to their rural palatial home. Raja Saheb would like her to live there and look after the business, but she refuses. Then she meets Anand and they fall in love and want to marry. Anand is introduced to Raja Saheb and Neelam to Anand's mom Shanti; both approve and start planning for the wedding and marriage. But Anand is not who he claims to be: he is a snake who was kept in captivity by Tantrik Goraknath, who wants to possess a priceless diamond stone called "Mani", and Neelam is the only one who knows its location. And Goraknath, unlike his mentor, Bhairavnath, has ensured that no one will stand in his way when he obtains the Mani.