Simhamukhi is a dubbed version of Tamil movie Pachchak Kuthira. In which, Parthipan by his own confession is a Porikki and due to the fear he is able to whip up, he rules over a slum area in Chennai. He is a sadist, a pervert and treats his own mother like a slave worker and swears at her.
He is always on the look out to make a fast buck and has no qualms about doing dirty jobs for others; provided he is paid. One day he walks into a marriage and is able to get a sneak view of the bride Namitha as she is dressing up for the marriage.
Instantly Parthipan takes a liking to her. He beats up the groom, marries the poor girl.