Auro (Amitabh Bachchan) lives with his mother Vidya (Vidya Balan). He is twelve years old and suffers from a rare genetic defect. He is mentally twelve but physically five times as old. Despite his condition, Auro is a happy child. Vidya has never told him that the upcoming politician Amol Arte (Abhishek Bachchan) is his father. But Auro somehow finds out and insists on going to Delhi to live...

Auro (Amitabh Bachchan) lives with his mother Vidya (Vidya Balan). He is twelve years old and suffers from a rare genetic defect. He is mentally twelve but physically five times as old. Despite his condition, Auro is a happy child. Vidya has never told him that the upcoming politician Amol Arte (Abhishek Bachchan) is his father. But Auro somehow finds out and insists on going to Delhi to live with his dad. Auro is also keen on bringing his parents together. Will he succeed in his mission before his health deteriorates completely?