Advocate Kurisummoottil Mariamma is one of the most popular figures in the Puliyangudi. She is a successful senior advocate, known for her versatile rhetoric and volatile temper while in court. She marries musician Melpathur Vishnu Namboothiri after a short span of love life. The problem between them starts with the arrival of their son, Vava. They soon separates and Vava grow up with his mother, who believes in no religion or caste, enters the church and conducts the temple festivals at the same time and helps the commoners of the village with his might . He is a proud and arrogant brat who looks after the family farm. He involves in every issues of the village which he solves by the violent fisticuffs. This in course of time earns him the name Pothu among the villagers.

Though he is an arrogant vanquisher before the masses, in front of his mother he is as tame as a house cat, and never does anything against her wishes.

Pothen Vava tells the story of the relationship between the two, and promises to have an ample dose of action, humor and melodrama. Mammootty plays the role of Vava, while pop diva Usha Uthup makes her first appearance in the silver screen as Advocate Mariamma. The film largely centers on family feud and social heroics and will offer many lighter scenes ala Oru Maravathoor Kanavu and Raajamanikyam