While on the run from Dhandapani's henchmen, Sathyaa gets shot and seriously injured, but manages to survive and is hospitalised. Few days later, Sathyaa sneaks into Dhandapani's house and takes the file containing evidence of both Mariappa's and Dhandapani's illegal activities. Enraged and betrayed, Sathyaa barges into a political meeting where Mariappa and Dhandapani are present and tries to expose Dhandapani, but is forced out and thrashed by the workers of Mariappa's party. Sathyaa also finds out that his services are no longer needed by Dhandapani, and he is thrown out of his house. Sathyaa later comes to know that Dhandapani is a corrupt man and double-crosser who used the evidence against Mariappa to join hands with him and contest the upcoming election in his place, and none of the evidence collected has been published anywhere.

Risking his life, Sathyaa gets a hold of the files. Finally, Dhandapani tells Sathyaa to get some secret files and documents against Mariappa, which can be used to expose him in public. With Dhandapani's help, he manages to get Sudha married to her boyfriend, who is the local police inspector, saves the marriage of his other stepsister by paying the dowry of ₹20,000 (equivalent to ₹190,000 or US$2,400 in 2020), and also ensuring that his father's employer treats his father with respect. Sathyaa's family disowns him for his activities, following which he is approached by Dhandapani, who convinces him to move to his own house and work for him. An enraged Sathyaa thrashes the murderers on their release and is arrested, but is released on bail by Dhandapani. Though Sathyaa tries his best, no one comes forward to give witness to the murder out of fear, and the murderers are soon released due to lack of evidence. Mariappa's gang attacks and kills Sathya's friend Sundar, in full public view. Mariappa orders that Sathyaa and his friends be eliminated. Mariappa also learns about Sathyaa and thinks that he is working for his arch-rival Dhandapani, a social reformer. Sathya falls in love with Geetha Nair, a Malayali woman who works as a salesperson in a cloth shop, and begins to grab public attention, as he and his friends start taking the law into their own hands, thrashing anyone who tries to break the law.

In retribution, Rangan and his men humiliate Sudha in public, forcing Sathya to thrash Rangan and destroy his bar. With this incident, Sathya's life changes as he invokes Rangan's wrath. These ruffians are the henchmen of a local goon named Rangan, who works for the local MLA Mariappa. One day, Sathyaa beats a group of rogues who are thrashing a tea vendor for not paying extortion money.

He stays with his father Rajarathnam Mudaliar, who is the sole breadwinner for his family despite his elderly age, stepmother, and stepsister Sudha. Sathyamurthy 'Sathyaa' is an unemployed youth who does not tolerate injustice anywhere.

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