About the two lookalike brothers who were separated during childhood by their cruel uncle who murdered his parents, rest of the film shows how two brothers join in avenging the death of their parents.
Kula Deivam was based on a Bengali film Banga Kora by noted writer Prabhavathi Devi Saraswathi
After losing his entire wealth to a courtesan, Kovalan returns to his wife, Kannagi. She offers him her last piece of jewellery to help him but he is falsely accused of theft and beheaded by the king.
