The plot is a lift from the highly rated comedy crime/thriller English Movie "Lucky Number Slevin". The plot has been indianized to make it relevant to Indian audiences. Everything else in the movie is similar except for the motive of the killings. There is no role for Bruce Willis Character in Laadam. The story begins with Kunjidhapadam (Aravindan) who comes from a small place to the city for an interview and he manages to find place to stay with his distant relative Subramanyam who is actually a defaulter on loans taken on interest. He is absconding but then leaves his key at a secret place. Kunjidhapadam takes the key and stays and he also manages to get a job. On the other hand, there is Angel (Charmy Kaur) who grows as an orphan and works with a mineral water company. She doesn't have a place to stay so she locates those houses without occupants and stays there for a night and gets going in the morning. One such instance gets her to Kunjidhapadam's house. All this apart, there are two dons Pavadai (Kota Srinivasa Rao) and Vembuli (Jayaprakash) who are out to kill each other and Vembuli is successful in killing Pavadai's son. So he vows to kill Vembuli's son by the 12th day ceremony of his son. A twist of fate occurs and Pavadai's goons mistake Kunjidhapadam to be Subrahmanyam and get him to take money. Kunjidhapadam gives an idea to kill Vembuli's son and he is given a 16 day deadline to kill else Pavadai threatens to kill him Vembuli come's to know of this and tries to kill Kunjidhapadam. But he comes alive. After that Kunjidhapadam again meets Angel and tries to get money from her to give it back to Pavadai which his distant relative Subramanyam has to give. At that time Pavadai realizes and confirms that Kunjidhapadam has to kill Vembulies son. He on the way back he mets the opposite gangsters and tries to escape from them. The gangsters get his files which contain his degree certificate. After that he meets Angel and returnes her money, which Pavadai returned with double of the amount and a gun. He meets Angel and both plan to stay in comedy actor Vadivelu's house. After that both follows a men working under Vembulie and went inside a restaurent where he managed to get information about Vembulie's son who is hidden in a moving air bus with lots of securities. And he is in search of the bus and founds. After that he tries to stop the bus and wants to talk with Vembulie's son. He tells all things happened with Pavadai and ask him to give him a job with security from Pavadai. But they plays a life game and ordered not to face again or else he will be killed. After that both went to a ministers house to stay at night and in morning they got caught and they managed to escape from the ministers gang. A police tries to escape them and he brings both to station and mistakenly he makes them to get married. And brought them to his house, because it is 100th marriage done in police station. In house first night has been arranged and at that time both Angel and Kunjidhapadam becomes closer and get good affectionate and both caught in love. Next day he tries to see Vembulie's son who is in a small boat and some of his gangsters were playing in beach and they throws him into the sea. He manages to swim and reaches the boat and asks for his degree certificates. They all played and tornes all his cerfificate and one of the guy from that gang asks him to send his Angel to him for prostitution. Now Kunjidhapadam got angry and kills all in boat and kills Vembulie's son too and brings the body in a small boat to beach where all gangsters were playing and kills all the mens in the gang. After that he brings the body to Vembulie's house and kidnapps Vembuli as well as Pavadai. And keeps both tied in a rock area and murders all. And again joins with Angel and starts back to Hydrabad and the film ends with got good job, they became parent for 2 children's and happy lived. more»

Shanmugham (Jeevan) comes to Chennai with his mother in search of his father (Raj Kapoor). When they get to the place, they see him living with another wife. In a hussle, he kills this old wife and sends this boy outside to beg. He comes out with dead mother and an auto driver (Chandrasekar) helps with all he has to cremate the body and gives some money and asks him to go back to his own city. Shanmugham wanted to read and become a great man. But he gets caught with the corrupt police guys and was used for their jobs (which involved murder). So when he grows up, he becomes a big rowdy by the name of Thotta (bullet). The highly corrupt police officer DCP Murugavel (Sampath Kumar) also uses him for a lot of encounters for which he takes credit and gets promoted to commissioner level. In one incident where he is asked to put acid on a girl Nalina's (Priyamani) face, he finds that girl to be the auto driver's daughter itself in her house. He helps that family, which is in poverty, with lot of gifts and also loves her. Nalina's aim is to become a police officer and she tells this to Shanmugham. As he has commissioner influence, he promises to get her the job. For this he kills a minister who is a big rival of the chief minister (Livingston) at the instance of Murugavel. But when Nalina goes to Murugavel for the job, the latter insists that she have sex with him. When Shanmugham finds out what happened, he and Murugavel part ways. Shanmugham has a friend Giri, who is also a rowdy, but gets him married to a nice girl Gauri (Mallika). She wants to separate him from this rowdy group and get settled, for which she tries not to send him for their encounters. After much thought, Shanmugham lets them go separately. But Murugavel kills Giri in an encounter. Prabhakar (Saranraj), a CBI officer, wants to get Shanmugham alive, whereas Murugavel wants him killed, otherwise he would be in deep trouble as he was the one who made Shanmugham a rowdy after all. How Shanmugham overpowers this duo and whether Nalina becomes a police officer forms the climax of the story. more»