| Director | Krish Thirukumaran |
|---|
Five IT employees – Santhosh aka "Sandy", Joe, Gokul, Vaishnavi and Nikita – meet a siddhar who has the power to grant wishes, during a weekend trip to the Chandragiri forest. A sceptical Sandy asks the siddhar for a copy of the Daily Thanthi newspaper dated on the day after Ayudha Puja (no newspapers are printed during Ayudha Puja). To his surprise, the siddhar materialises the requested copy. The IT gang reads in the newspaper that the company which they work for (Satyam Computers) would close down the next day. When this does happen, they accept the credibility of the newspaper and decide to make money through it. While Vaishnavi is reading the paper, she sees an article mentioning a certain Peter winning a boxing tournament on the day of Ayudha Puja and dedicates the prize money of 2,00,00,000 to the five of them. The IT gang is astounded on reading this news and decide to find this Peter and sponsor him for the boxing tournament, with the hope of getting the money.
The IT gang successfully manages to track down Peter. However, they immediately find that he is not a boxer but rather an unambitious youth who spends roaming around with his best friend, Neruppu Kumar. However, he is in love with a young woman named Yazhini Sethuraman, who is a sports buff. To impress Yazhini, he accepts their offer to participate in the tournament. However, Peter does not show any inclination to train for the tournament and instead uses the IT gang to fulfill his own desires, including winning Yazhini's heart.
Later, the IT gang finds out that there is another boxer named Peter and he is a 15-time champion boxer, nicknamed "Peter the Killer". Thinking that they are sponsoring the wrong Peter, the IT gang approaches "Killer" Peter and offers to sponsor him, but he refuses. They reluctantly decide to continue sponsoring the initial Peter.
The boxing tournament starts, and Peter somehow manages to win all the preliminary matches by fluke. The media gives a name for his technique: "Maan Karate", (Deer Karate). Peter soon becomes known as "Maan Karate" Peter to distinguish from Killer Peter.
Eventually, Peter enters the final of the tournament, where he faces Killer Peter. He fears that he might be killed by Killer Peter and also fears Yazhini's rejection if she finds out he is not a boxer. He tries to avoid fighting in the final through various means but none of which are successful.
In a last-ditch attempt, Peter tries to convince Killer Peter to throw the match so that he could win and impress Yazhini but Killer Peter refuses. Peter begins to train hard for the final. Meanwhile, the IT gang defects to Killer Peter's side after being offered 75,00,000.
The final takes place on the day of Ayudha Puja. Killer Peter immediately gains the upper hand. However, Peter is undaunted and continues to put up a brave fight. A teary-eyed Yazhini, who has found that Peter is not a boxer, tries to convince him to call off the fight, but he refuses and fights on, eventually knocking out Killer Peter. Peter wins the tournament and dedicates the prize money of 2,00,00,000 to the IT gang, but they deny the offer. He also publicly conveys his love to Yazhini.
The film ends with a display of a portion of the newspaper, the siddhar had materialised, torn by Nikita and left at the Chandragiri forest several months ago. The portion shows a photo of Maan Karate Peter lifting the boxing tournament trophy.