Rajesh Khanna plays a man drawn unwillingly into a nest of enemy spies and intrigue with the future of his country riding on his shoulders.Chhaya (Neetu) and Amit Narayan (Rajesh) are in love and Chhaya wants to get married. Amit doesn’t see why they have to get married and wants to keep things as they are. Wedding dates are set and then moved, to her great frustration.This is really their only point of discord.Amit lives alone, and is also very fond of Chhaya’s family: father (Om Shivpuri), mother (Dina Pathak), little brother Raju (Master Raju Shrestha)and sister Maya (Rozeena).It is Diwali, and as children burst crackers and set off potentially limb-severing fireworks, Amit’s upstairs neighbor Raman (Vinod Mehra) has been watching a group of men in a tent just outside the building’s courtyard.