One Two Three Hindi Movie

Diamonds worth Rs.100 million are stolen from a dangerous don, Papa (Mukesh Tiwari) and the precious stones accidentally fall in the hands of young love birds - Chandu (Upen Patel) and Chandni (Tanisha), who quickly hide them in a car.

Papa and his idiotic henchmen Albert (Vrijesh Hirjee) and Pinto (Manoj Pahva) are desperately hunting for the diamonds while hot-headed police officer Mayavati Chautala (Neetu Chandra) wants to nab criminals.

Enter the first Laxmi Narayan (Tusshar Kapoor), who belongs to a mafia family. His mother is hoping that despite a few murders under his belt, he will settle down in life. After failing badly in his initial attempts, he gets a chance to redeem himself as a don by killing Papa. He goes to hotel Blue Diamond to kill Papa.

Now enter the second Laxmi Narayan (Suniel Shetty), a management postgraduate from Darjeeling. He too is sent to hotel Blue Diamond to collect a new car for his boss from Laila (Sameera Reddy).

The third Laxmi Narayan (Paresh Rawal) is a hawker who has made so much money selling underwear on the footpath that he has set up a lingerie factory for his son. His son sends him to the same hotel to collect lingerie samples from upcoming designer Jiya (Esha Deol).

Three Laxmi Narayans are at the same place at the same time waiting for messages at the hotel reception desk.

The messages go to the wrong people.

The first Laxmi Narayan gets lingerie designer Jiya's photo and goes to kill her, only to end up as her hero. The second Laxmi Narayan gets Papa's photo and goes to collect the car from him, only to be mistaken for a killer and gets beaten black and blue. The third Laxmi Narayan gets Laila's photo and asks her to show him her underwear, only to be branded an old pervert.

Meanwhile, Chandu and Chandni are determined to stop anybody from buying the car where they have hidden the diamonds.

However, Laila has to sell the car to save her showroom. And Jiya has to sell her designs to save herself from lecherous Mende's clutches.