First, Vinay plays dual roles in this film. They are like Tom and Jerry, and are constantly at each others throats, right from inside their mother's womb. In a twist of fate, they get separated at a young age, and one Vinay ends up in Andra Pradesh while the other stays with his parents in Thirunalveli. Meanwhile, there is another huge conflict between Vinays' father and his close relative over their ancestral property.

In a confusion and anger Vinays' father kills his relative, because he thinks that he was the one responsible for loosing his other son. Tension arises from that point of time between the families. Thirunalveli Vinay falls in love with Samuthirka, but is unable to get married to her because the wife of the demised relative plots a revenge by getting her brother married to Samuthirka.

After series of incidents, the property issue reaches to a breaking point, and Vinay demands his mother to split the property, but she refuses to do so, as she believes that her lost son is alive and that she will only split it after he comes back to her. The rest of the plot revolves around how the twins patch up to solve the issue, and the confusions that lead due to mistaken identities and twins switching places.

The film is filled with a lot of sub-plot that it confuses and spins the minds of the viewers. It'll be a true surprise if the story even makes sense. Vinay's performance is comical and decent, while the three female leads; Samuthirka, Kesha Khambhati and Swasthika are mostly a part of the film for glamour purposes.

Director Saran Kulandaivelayudam, is famous for making pure masala films which contains loads of entertaining factors, but has failed to provide that in this movie, because the story if full of sub plots, unrealistic performances and never-ending convoluted screenplay. Krishna Ramanan's cinematography skill's come to fore and he has shot well, while Bharathwaj takes care of the music department and has scored decently.

In short, Ayirathil Iruvar, is timepass.