Khatarnaak (1990)

Raised in an atmosphere of hate, violence, and crime, Suraj alias Sunny is a cold-blooded killer, who mercilessly kills his victims for the right amount, usually following the instructions of his boss, Dhabariya. When Suraj is arrested, he is imprisoned and gets to meet Dr. Sangeeta Joshi. Suraj starts to fall in love with her, but Sangeeta will nothing to do with him, until he gives up his present way of life. Suraj does attempt to give up his criminal ways, only to find out that Sangeeta has married Yogesh Kothari, and his associates and those of their rival gang, Jaunpuriya, will not let him just walk away.