Rizwan Khan (Shah Rukh Khan) suffers from Asperger's Syndrome. The person suffering from this takes everything at face value. He cannot understand it when people say one thing while meaning another. He understands only straightforward talk. At the beginning of the movie, Rizwan is on his way to meet the President of the USA. He wants to tell him, "My name is Khan and I am not a terrorist". The...

Rizwan Khan (Shah Rukh Khan) suffers from Asperger's Syndrome. The person suffering from this takes everything at face value. He cannot understand it when people say one thing while meaning another. He understands only straightforward talk. At the beginning of the movie, Rizwan is on his way to meet the President of the USA. He wants to tell him, "My name is Khan and I am not a terrorist". The film goes in flashback to show us why Rizwan feels the urge to do so. Rizwan is brought up by a loving mother who does not understand what his problem is but encourages him to do his best in everything. The most important lesson she teaches him is that there are only two types of people – the good and the bad. Rizwan is privately tutored as the other kids treat him badly at school and learns to repair all electronic stuff. He goes to settle with his brother (Jimmy Shergill) in California after their mother's death. He meets Mandira (Kajol), the divorced single parent of Sameer. Rizwan woos her in his own style and they get married despite her being a Hindu. Soon after, the 9/11 attack happens and the safety of all Muslims is threatened. The film goes on to show how this affects the life of the Khan family and why Rizwan sets out to meet the US President.