viswasam full movie download, Thooku Durai (Ajith Kumar) is a well-respected chieftain of his village Koduvilaarpatti of Theni district. After 10 years, a thiruvizha (festival) is set to occur at the village’s Ayyanaar temple, when Thooku Durai’s rival (O. A. K. Sundar) tries to stop the thiruvizha from occurring. The thiruvizha occurs, thanks to Thooku Durai’s intervention; however his aunts (Kalairani and Sujatha Sivakumar) and grandmother have been longing to see his wife and child. After much deliberation, Thooku Durai decides to go to Mumbai to meet them.
On the journey, Merit (Robo Shankar) and Rosamani (Thambi Ramaiah) are upset over Thooku Durai’s current life and remind him of his life 10–12 years ago; Thooku Durai used to be a happy-go-lucky man and rice mill owner, and was also a good Samaritan, albeit using violent ways to deal with problems. When chasing a few goons, he stumbles across Niranjana (Nayanthara), a doctor, who witnesses his antics and lodges a case against him. When he sees her, he is immediately smitten by her and surrenders to the police, out of the love he has for Niranjana, but she is later forced to release him after Aavudaiyappan (Mime Gopi) threatens to close her medical camp unless she pays him.
After fighting the goons, Thooku Durai relocates her camp to his rice mill. Niranjana realizes her love for Thooku Durai and proposes to him, which he gladly accepts. They get married and lead a happy life, but Niranjana is disturbed by Thooku Durai’s involvement into feuds. Soon, she gets pregnant and is accepted to go to one of the finest pharmaceutical programs in the country, which she refuses for Thooku Durai. After their child, Swetha is born,
one day, Niranjana leaves out of town, after getting a promise from Thooku Durai not to bring Swetha to any fights, and on the way to pick her up, Aavudaiyappan, waiting for revenge, picks up a fight with Thooku Durai. Thooku Durai, not finding Niranjana at the train station, finds her at home, and Swetha passes out as she had been injured during the fight. After rushing to the emergency ward, she survives, but Niranjana gets infuriated at Thooku Durai and tells him to stay away from her and Swetha and leaves Thooku Durai.