Intrigued, Siva requests Maya to tell more about the river interlinking project that they worked on. She also tells that Shakthi felt very guilty of indirectly causing so much life loss. In the present day, Maya reveals that she never heard of Shakthi after that. While the work is going on, a sudden landslide occurs, and in a bid to escape, a lot of people get buried underneath and lose their lives, including Shanmugam.
The trio and the villagers begin work in full earnest. Initially miffed about the nuisance, the collector argues, but after hearing out Shakthi and his friends, he relents and gives permission. Things go awry when two goons enter the crowd in disguise and incite violence, thus forcing the police to charge on them. Shakthi and his friends initially face tough challenges in the form the government officials and even the local police, but overcoming all struggles, the trio, supported by the villagers, protests in front of the district collector's office to obtain permission for constructing the canal. The villagers, pleased with the idea, offer their support to Shakthi. The reason being shown is that the said river has a surplus amount of water and often floods that village during monsoon, and the idea is to use the excess water by means of the canal for farming. He even instigates Shakthi's father against his own son, but in a public meeting with the villagers, Shakthi, Shanmugam, and Maya convince the villagers to help them unite a dry river in their village with an overflowing river in a village 20 km away, by building a canal. Initially, Shakthi and his friends face resistance in the form of the local councillor Mailvaganam ( Ravi Mariya), who was insisting on all farmers selling their lands to him for money instead of continuing agriculture. Shakthi gets frustrated and decides to go back to his village and do farming instead of continuing in the IT industry. Due to some internal conflicts, the three are sacked from their jobs, along with many others. Shakthi, along with his friend Shanmugam ( RJ Balaji) and Maya, used to work for a multinational company. Out of guilt, Siva admits the person in a hospital, and there they meet Maya ( Indhuja), who narrates Shakthi's life to them and tells them why people are after Siva. While chasing the perpetrators by car, Siva accidentally knocks down a person on the road. In Trichy, Siva and Gopal go about trying to find out more about Shakthi, when yet another attempt is made on Siva's life. Gigi feels guilty and asks for his forgiveness, after which the two reconcile. In a parallel storyline, it is revealed that Gigi had rejected Siva earlier (owing to not liking his looks prior to surgery), and during the course of the train journey, Siva reveals his true identity. Siva sets out to Trichy with Gopal and his girlfriend Gigi ( Megha Akash) to know Shakthi's whereabouts. Siva learns from Gowri that his face donor was not really her son, and from another friend, that this person hailed from a Village near Trichy. Following the third attempt on his life, Siva and his friend Gopal ( Sathish) realize that the troublemakers could be targeting his face and not him in particular, as not many were aware of his face transplantation surgery.
After getting attacked by some strangers a couple of times, Siva realizes that someone is after his life. Little did he know that he has to face several issues in the coming days. Siva, who gets a new lease of life, plans to start a business to take care of his family. Upon hearing the pleas of Siva's parents, she relents, and Siva's face is swapped with that of Shakthi's.
He is declared brain dead, and doctors request his mother, Gowri Thiruselvan ( Suhasini Maniratnam), to donate his organs. At the same moment, another patient, Shakthi ( Atharvaa), is admitted in the hospital. It is then told that Siva's face was heavily damaged in a fire accident and that the doctors think that a face transplant is the only way out to rectify his facial deformities. The patient is revealed to be Siva, whose original face at that moment is not shown.
The movie begins in a hospital, with a patient being rushed to the operation theater. ( August 2020) ( Learn how and when to remove this template message) Please help improve it by removing unnecessary details and making it more concise. This section's plot summary may be too long or excessively detailed.