Scientist Dr. Sanjay Mehra, has created a computer from which he sends variations of the syllable om into space, hoping to attract extraterrestrial life. When he believes he has finally received a response, the scientific community mocks him. While driving home, an alien spacecraft appears overhead. Distracted, Sanjay drives off the road, causing the car to explode, killing him. His pregnant wife Sonia, survives with injuries and from Canada, returns to her home, India. When her son, Rohit, is born, he is mentally disabled due to an injury he received in the accident as a fetus. Sonia learns that surgery is the only solution to Rohit’s disability, but it could result in paralysis or death. Not wanting to lose her only remaining relation and sign of her husband, she raises him in the town of Kasauli, where he grows up to be a man of limited intellect.
A young lady named Nisha Malhotra comes to Kasauli and is initially antagonistic to Rohit due to his childish pranks against her. This causes her friend, who is the son of the collector of the town, Harbans Saxena, Raj, and his four buddies to attack Rohit and break his kick scooter, but Sonia chastises Nisha and Raj for assaulting Rohit, signalling to them that Rohit didn’t intentionally make fun of her or want to hurt her. Realizing her mistake, Nisha gifts Rohit a bicycle and also introduces him to her mother and father, who are also sympathetic to him.
Rohit and Nisha, now good friends, find Sanjay’s old ‘Om’ computer and Rohit inadvertently summons the aliens. The visiting aliens leave in haste, accidentally leaving one from their group behind. Rohit, Nisha, Rohit’s six young friends, and Sonia find and befriend the alien naming him Jadoo (Magic) and discover his psychokinetic abilities. Raj does not like Nisha getting close to Rohit so Raj bullies Rohit and spreads a fake rumour that Rohit and Nisha are getting married. This upsets Nisha and Rohit, who is especially hurt as he thought Nisha was his girlfriend.