Nanna is the story of a girl who loses her mom when she was born and is being taken care by her mentally challenged dad. The Film begins with Vikram chasing a car in which her daughter is being forcefully separated by his father in law. Finally, he would be left stranded in the middle of the road. He goes to court to take the possession of his daughter.
• Both Nanna and Deiva Thirumagal had simultaneous release.
• The film has its basic plot and lead character inspired from the 2001 American film I am Sam written and directed by Jessie Nelson, and starring Sean Penn as a father with a developmental disability