Paa is an interesting story with thought-provoking themes such as victims of Progeria, children that's been abandoned by a parent, the youth of today who wants a career and success rather than a family and responsibilities. Paa shows how a young and ambitious student, Amol, abandons responsibility (his son) to become a politician and through this process learns to be responsible.
Paa has a strong story-line in the sense of children with Progeria and single-parenting. But it loses focus at times with a needless backdrop in the form of politics. There's both good and bad script writing there.