Trama

Raju is hired to pose as uncle to three orphaned kids in order to usurp their inheritance. But he changes his mind after falling in love with their governess and decides to fight the greedy relatives.

The story of the film is of Siddhant Rai, who is a wealthy businessman looking for teacher for his three young children. They enjoys a lavish and a luxurious life. He hires Anna as governess for his children. Shekhar is a conman who is trying to impress Anna with fake stories. Anna falls in love with Shekhar. When she finds out the truth of Shekhar, she becomes angry and leaves him. The life turns upside down when Siddhant Rai dies in an accident and his children are left alone. His relatives try to capture Siddhant Rai's property, then suddenly Shekhar appears again posing as their parental uncle, to save Siddhant's children from going to orphanage. Anna returns home to find Shekhar posing as Raju. Shekhar convinces her and they once again start loving each other. Drama further gets complex when another man who claims to be the real Raju Chacha and brother of Siddhant Rai appears.—Abhishek Kumar

Siddhant Rai is a single father, looking after three young children. All four of them live a wealthy and comfortable lifestyle, which changes suddenly when Siddhant passes away after a car accident. Siddhant's shady relatives hire a former jailbird and con-man by the name of Shekar to pose as their paternal uncle, Raju, which he does for a hefty sum of money. When Raju is introduced to the children, he is an instant hit with them, as well as their Catholic governess, Anna. Then the Rai family are stunned when another young man enters their lives - claiming to be the real Raju Chacha.—rAjOo (gunwanti@hotmail.com)

Siddhant Rai (Rishi Kapoor) is a rich widower who lives with his three mischievous children. Siddhant had a younger brother named Rajit, who had a fallout years ago & left Siddhant. Nobody, not even Siddhant's children & his dead wife's crafty relatives know what Rajit looked like. Kids include Rohit (Harsh Lunia), Rahul (Kinshuk Vaidya) & Rani (Sakshi Sem). Kids are supported by house servant Banke Bihari Chaturvedi or BBC (Tiku Talsania). The crafty relatives include Vikram Sinha (Govind Namdeo) & Prabhakar Sinha (Pramod Moutho). Vikram's son is Ranjit Kumar (Mayur Verma).

Vikram and Prabhakar are angry with Siddhant as he is using company money to fix a dam built by his firm but now handed over to the Government. Siddhant says that the dam endangers several hundred villages and fixing it is a civic duty. Vikram disagrees and says now the dam is the responsibility of the Government.

Siddhant orders the repair of the dam, but Vikram secretly stops the work. Vikram and Prabhakar are 30% owners of the company. They were ones who also used sub-par cement on the dam. Eventually the dam breaks and Siddhant is livid that his orders were not carried out. He orders his own inquiry into the dam failure.

The kids don't allow any teacher to stay by playing dangerous pranks on them. Siddhant wants to send the kids to a boarding school, but BBC stops Siddhant as this is what happened with Rajit as well. A young girl who works in an orphanage named Anna (Kajol) applies for the job of nanny for the children. The kids try to get her to leave the job, by playing pranks on her. They try to scare her with the haunted house bit, but Anna scares them right back. Things get too far when they send her a fake telegram telling of her parents' death. She is hurt by this prank but relents when the kids are really ashamed.

Meanwhile a bank thief and conman named Shekhar (Ajay Devgan) and his friend Jaddu (Johnny Lever) are on run. They see Anna & mistake her to be a relative of Siddhant. He sees Anna come out a Mercedes and figures that she comes from a rich family. They are stuck in a traffic jam together and Shekhar tries to woo her. Jaddu tells Anna a sob story that she look exactly like Shekhar dead lover. Shekhar pursues Anna with this story and Jaddu pleads insanity on his behalf. Through Anna, Shekhar meets the kids as well. Shekhar aims to con the children with his charm, hoping to marry Anna & become rich. Anna falls in love with Shekhar.

Siddhant, who thinks that Shekhar is a decent boy, permits the marriage. Just when Shekhar really falls in love with Anna, Siddhant exposes Shekhar on the wedding day. A shattered Anna leaves the household. Siddhant sends Shekhar to jail.

Vikram and Prabhakar who are responsible for the failure of the dam, decide to kill Siddhant & his children in an accident. Siddhant's engineer Murthi (Adi Irani) has prepared a report and has named Vikram and Prabhakar responsible for the accident. Murthi is shot by Vikram, but he manages to fax the report to Siddhant. Siddhant dies, but the children are saved. Their custody goes to Siddhant's relatives. Since Rajit has not tried to contact Siddhant for 14 years, he is considered dead. Vikram and Prabhakar make the children's lives miserable.

Shekhar learns of Siddhant's death & children's plight via Jaddu. He decides to do a good turn & re-enters the home posing as Siddhant's long lost brother Rajit Rai. BBC collaborates with Jaddu to bring Shekhar into the house, as he could see that Vikram and Prabhakar would eventually kill the kids. BBC shares all the inside information to prove that Shekhar is Rajit. Anna too has returned after learning about Siddhant's death. She, along with the children, have an uneasy truce with Shekhar as he is their only hope now. Shekhar even saves Anna from Ranjit's evil eye.

The villains try to discredit Shekhar, but the whole game turns Topsy Turvy when real Rajit Rai shows up.

Seeing their last chance to usurp Siddhant's money vanish, the villains now side with Shekhar, prove him to be the real Rajit Rai aka Raju Chacha. The deal is simple: Shekhar will be their partner & get a 25% share in the estate. Anna witnesses this deal and again believes that Shekhar has betrayed her trust. However, Shekhar stuns the villains after being proved as Rajit Rai by letting them know that the "real" Rajit Rai is only his fellow conman Gafoor (Sanjay Dutt). Anna's trust in Shekhar is back as she sees that Shekhar only wanted to protect the kids and did not desire any money or wealth.

Shekhar helps the kids get their rightful legacy back. Anna reconciles after seeing the change in Shekhar, but the joy is short lived when the villains succeed in sending Shekhar back to jail. Meanwhile, the truth of Siddhant's death is revealed to the children. The kids record Vikram's conversation on tape where he talks about how he got Siddhant killed. Shekhar escapes again & kills the villains' same way they killed Siddhant. The end credits come up as the kids sing in the hope that their real Raju Chacha one day might come back...