[1] Jaya Bachchan makes a cameo appearance in the opening credits of the film as a narrator.

Auro is an intelligent and witty 12-year-old boy with an extremely rare genetic disorder called progeria.

Amol reads it and obtains a restraining order from the High Court stating that nobody can disturb him without permission.

Auro tries to get his mother and father back together, but Vidya resists, still hurt by the fact that Amol wanted her to have an abortion when they first found out she was pregnant.

Auro's health begins to deteriorate as he reaches his 13th birthday, his physical defects catching up.

They perform the first wedding rites in the hospital in front of their dying son, implying that they will do the rest later.

Auro, succumbing to his disease, says his last words, "Maa," to Vidya and "Paa," to Amol before dying with a satisfied smile.

The movie ends in the rain with Vidya mourning Auro's death as Amol comforts her.

The film had Amitabh Bachchan playing the role of a child who is suffering from Progeria, a genetic disorder which leads to quick acceleration of ageing process in children.

"Halke Se Bole" is based on the Tamil song "Putham Pudhu Kaalai" from his 1980 film Alaigal Oivathillai.

A critic from The Times of India wrote that "Paa is primarily a platform for Auro to steal your heart away.

[7] A critic from The Hollywood Reporter wrote that "This would-be tearjerker without the musical numbers of typical Bollywood fare is for die-hard Amitabh Bachchan fans only".

[8] A critic from Bollywood Hungama wrote that "A film that should strike a chord with every paa, maa... just about everyone with a heart!