Story: Bhavna Dayal and Mala Jalan had been fellow collegians and close friends, both come from very wealthy families. Bhavna is in love with another ex-fellow collegian, Tarun Haksar, who also comes from a wealthy family, and is also in love with Bhavna. Their respective families' expect both to marry each other. However, Tarun and Mala suddenly announce their engagement, and get married, ... ...detailed story of Kal: Yesterday and Tomorrow