Jeeva aka Sketch lives with his uncle Dorai, who used to tow and bring back vehicles for which the monthly EMI had not been paid. However, during a fight, he loses his hand, and Sketch is provided with the job, who does his day-to-day job perfectly. Dorai's right-hand Ravi wanted to take over the business. However, Bhaskar "Boss" Settu agrees with Sketch coming up to the position.

At a college, Sketch tows a scooter that belonged to Manju, Ammu's friend. The next day, he happens to meet her on a bus. When some other guy tries to harass her, Sketch bats away his hand, where the bus stops quickly, causing Sketch to bump into Ammu. She mistakes this as him trying to make advances on her and yells at him, only later does she realise that he was trying to protect her, and she falls for him.

One day, Sketch loses a bike while bringing it back to the garage. The owner gets enraged and demands ₹2 lakh (US$2,500) from Settu. Sketch realises that this was a plot by Ravi to embarrass him, where he faces them to retrieve the money and the stolen bike, which earns back Settu's trust, and they celebrate. Settu reveals that his father was insulted by a local goon named Royapuram Kumar, where he asks Sketch to sketch a plan to steal Kumar's car.

Sketch steals Kumar's car and ends up in a goose chase with police that ends with Sketch creating a rivalry with Kumar. Kumar brings a gang from another state to finish off Sketch and his team, where after one by one, Sketch's friends are killed, and Sketch is confused about who the killer is.

Later, Sketch is confronted by the boys, who were working along with Sketch in Settu's garage. The boys reveal that they planned and killed Sketch's friends out of jealousy to take Sketch's position. Sketch forgives them and protects the boys from police by helping them escape, where the film ends with a moral: avoid child labour.