One day, Ashok Selvan, who is walking on the beach comes across some garbage which he disposes in a trash can. School girl Priya Anand, who happened to pass by, takes notice of his act and compliments him, which is like of breath of fresh air since not a single person in his life has praised him for anything till date. Priya Anand soon completes her schooling and is announced as the state first student, who then takes up journalism as her major in college. Ashok Selvan sees this being telecast during her interview to a television channel and signs up for the same course in the same college Priya Anand has joined.
Ashok Selvan then proposes to Priya Anand, who tells him to achieve anything of significance and then come to her. Hurt and disappointed, Ashok decides to take his own life by committing suicide. It is then when he witnesses a baby struggling for its life and he steps in to save the child. This incident is captured in a video by a passerby which eventually comes to Samuthirkani's notice.
Samuthirakani, who happens to be a prominent rowdy in Chennai conveys his gratitude for saving his child's life and extends his hand for any kind of help he requires. He also assures Ashok that he will take responsibility for his union to Priya Anand. With his help, Ashok does few things that make him popular and Priya Anand finally accepts him. However, she walks away from him after she comes to know that Ashok had not achieved what all he had done by himself. Soon after, an alliance for Priya Anand is also fixed. The rest of the plot revolves around whether Priya Anand marries the person whom her family has seen for her and how Ashok Selvan goes on to make a name all by himself.
Ashok Selvan has played his role better than his previous films and has pulled off the middle-bencher character quite well. Priya Anand has performed as required for the her role and has not gone overboard in any department. She looks exceptionally beautiful on screen and is a pleasant vision to our eyes. Samuthirakani has pulled off his role of a rowdy as well as a father with ease. Bala Saravanan's comedy is on point and enjoyable while Marimuthu, Anupama Kumar, John Vijay coming in as supporting characters have given decent performances.
Director T. J. Gnanavel has shown the plight of the middle-benchers, their agonies, their desires in an enjoyable manner. His attempts to convey the message of food wastage and how it should be distributed rather than just being strewn away is praiseworthy. Nivas K. Prasanna's songs are good to listen and he shines in the background score department. P. K. Varman's cinematography skills come to the fore and he has shot the film well.
In short, Kootathil Oruthan stands out.