Hero Raj Kamal lives in a village and makes mud dolls for his living. He is in love with his next door girl Manasa. Apart from his work, Raj Kamal carries out the small tasks given by the village head who do not support lovers.
Delhi Ganesh also lives near Raj Kamal's house and his daughter Dhivya who is in her school finals, is attached to Raj Kamal like a sister. She is in love with a college student named Hari.
One day, when Dhivya and Hari are together in a lonely place, Raj Kamal's friend happens to see them and scolds them. In return, Dhivya snubs him and makes him leave the place with anger. On knowing this, Raj Kamal calls his friend and consoles him.
In another situation, when the lovers meet alone, Hari takes a selfie with Dhivya. Though Dhivya erases the picture immediately, she receives the same copy in her mobile later from an unknown number. Feeling bad about this, Dhivya argues with Hari so harshly and then commits suicide at her residence.
Later, Raj Kamal comes to know that Dhivya's death is a murder and not suicide. Amidst this, Raj Kamal's lover Manasa gets attacked mysteriously and her brother's dead body is laid near the hill side. The rest of the movie narrates how Raj Kamal finds out the truth and the aftermath.
Actor Raj Kamal has been promoted from small screens to big screen but his over acting do not support him in cinema. The audience fail to relish his performance in sentiment and emotional scenes due to his over acting. His performance would be better, if the actor is selective about his directors.
Although Manasa's character is not that powerful, she has done her portions in an appreciable manner. The whole movie revolves around Dhivya and she has portrayed her role well. The romantic scenes of Hari and Dhivya are enjoyable. Veteran actor Delhi Ganesh does not have much scope to act and the other members cast are not able to register themselves with the viewers.
Director Anbumathi has come out with a different script but the movie would have been enjoyed with a good screenplay and a better performance from the cast.
Veera's camera work is to the average. Even the songs are not enjoyable with Varasri's music but the BGMs add the needed support for the running of the movie.
Overall, Sandikuthirai fails to attract the audience.