Events in India's history — from the Emergency and the famous Cricket World Cup win to the Punjab riots , unfold from the perspective of an innocent Sikh man Laal Singh Chaddha, a person with a low IQ but high optimism. Laal is able to achieve everything under the sun but his childhood love continues to elude him.

A mysterious traveler slips into the heart of Karachi's underbelly and rises through its ranks with lethal precision, only to tear the notorious ISI-Underworld nexus apart from within.