Auro suffers from a progeria like syndrome. Mentally he is 13 but physically he looks 5 times older. In spite of his condition, Auro is a very happy boy. He lives with his mother Vidya, who is a gynaecologist. Amol is young, progressive politician. He is a man with a mission. Auro is Amol's son. Paa is a 'rare' story about a father-son, son-father relationship.