Watch Prem Shakti
Ganga and Gauri are a pair of star-crossed lovers, yet forbidden from marrying. After the two try to elope in the night, they stumble into the lair of a sage who beseeches the Lord of the Snakes into granting him a gem that will result in granting his immortality. This particular ritual only occurs once every quarter century. While the lovers defend the Lord and ruin the sage's machinations, the sage petrifies Gauri and inadvertently kills Gangwa from the agonizing loss. While sad, their sacrifice is not forgotten; the Lord decrees that their love shall reincarnate them again and again.