Automobile engineer Deven Chaudhary, who lives with his mother Suhasini and ten-year-old son Raj, builds a futuristic car with advanced features. He names this design DC.
He also owns and maintains an older Morris Minor car that was handed down to him by his late father that he calls "Taarzan," based on the car's mirror ornament that resembles the fictional character Tarzan. Deven meets with FourFox, a private company, to discuss his design. FourFox executive Rakesh Kapoor and his partners Kailash Chopra, Anthony D'Costa, and Mahesh Saxena praise the design but disagree over royalties. However, they steal the design and register it under their own name. This infuriates Deven, and he files a complaint with the police. Unfortunately, the police inspector Sanjay Sharma, who takes his case, is secretly on Rakesh's payroll. He, along with Rakesh and his cronies, attacks Deven, gags him, and locks him in his car. They then push the car into a lake, causing Deven's death, with his family never knowing what happened to him.
Twelve years later, Raj, now a 22-year-old young man, attends college, where he falls in love with Priya, a rich girl. Raj also works as a part-time mechanic at a garage owned by Kartar Singh. One day, he discovers his father's old car, Taarzan, in a scrapyard. He pools money demanded by the owner of the scrapyard and buys it for ₹5000.
Raj works with Kartar Singh to repair and upgrade the car in memory of his father. They revamp the car into a more advanced version than Deven's original design, and Raj decides to rename it DC to honour his father's memory. However, the car would not start due to a damaged fuel pump, and it does not seem reparable, depressing Raj.
One night however, Deven's spirit powers the car, making it run miraculously. Raj, Priya, Suhasini, and Karter celebrate. While taking Priya and Suahsini out, he grabs his rival classmates, Rocky and his goon's attention who pick a fight with him. Deven's spirit witnesses this and decides to drive the car later that night and go after the boys. Eventually, he injures them which makes them apologise to Raj, who they think is driving the car. The next day, Rocky and his friends approach Raj and apologise once again and beg for mercy, which confuses Raj. However, he accepts their apology, and they all become friends.
When Raj leaves his car unattended, Deven takes control of it to seek revenge on his murderers. When Rakesh is abroad, Deven's spirit uses the car to kill Kailash, Anthony, Mahesh, and Sanjay. His power and control of the car also made it so he can miraculously repair itself as if nothing happened, making Raj unaware of the activities. Since the car belongs to Raj, he becomes a suspect in the eyes of Inspector Khurana, the investigating officer. Khurana takes Raj in for questioning when Mahesh's widow was allegedly attacked by DC/Taarzan without the "driver" exiting the vehicle. (Deven blew his horn heavily which caused a sound shockwave, destroying Mahesh's property.) However, Raj is released as Priya was his alibi along with his class rivals-turned-friends all present with him at a nightclub during the night in question. When Rakesh returns to , he learns all his partners' fate.