One renowned scientist Mr. Sanjay Mehra develops a computer, that can send variations to space, of a sound OM OM OM OM, to find whether there exists any power outside earth or not. No one believes him, when he gets a response from there.
One day, they find a spacecraft, due to which everything is shaking badly. Their car moves off the track and catches explosion. Mr. Mehra die on the spot, while his pregnant wife somehow manages to survive. Then, Sonia returns back to India. Their son, Rohit is born disabled, reason being an injury during the accident.
The injury may be cured by a surgery, which may also lead to death. So she rejects the idea and raises him in Kasauli. Rohit along with his friends prank on a girl, Nisha who is new in the town. When her friend Raj gets to know about it, he attacks Rohit and breaks his scooter. This makes Rohit's mother make Nisha realize her mistake.
Nisha gifts him a new bike and befriends him. They start spending time together and start playing the Om sound on the same computer. Aliens come again in the spacecraft. One is left on the planet, while the spacecraft leaves. The team befriend and name the alien Jadoo, keeping him secretly in the out house.
Raj dislikes whatever is happening and he spreads rumours that he and Nisha will get married soon. This disheartens Rohit, as he considers that Nisha is his girlfriend.
Jaadu realizes Rohit's abnormality and recovers Rohit, who can watch without glasses now, and can solve maths problems leaving the teacher surprized. His physical ability is also improved appreciably. Most of the school accepts the new version of him.
Raj challenges him to play a basketball match. Later Jadoo helps them in the match, after he gets a recharge from sunlight. They have to flee from the place, due to which Jadoo falls and is noticed by Inspector Sukhwani. Jadoo disappears when he is informing the authorities.
But, they suspect Rohit and interrogate him and take Jadoo away. Rohit catches them and saves him from being sent to America for research. The spaceship returns to take Jadoo. As soon as he leaves, bidding a goodbye, he is also reverted back to previous Rohit. Due to which he is saved from prosecution. Rohit's powers return back later, permanently. Nisha marries Raj and gives bith to their son Krishna, to live happily thereafter.