The movie begins with Karthi undergoing a police training to attain the post of Assitant Commsioner. Meanwhile, he meets Rakul Preet Singh and falls in love with her. Though she initially rejects him, she accepts him later on and they also gain acceptance from their families and happily get married, after he gets through his training. As Karthi is a sincere and a hardworking police officer, he constantly faces troubles from both the bad guys and his superiors. Hence he keeps getting transferred to one place or the other.
In the mean time, he comes across a murder of a family committed near the highways, upon thorough investigation Karthi gets to know that this is a recurring crime which has been happening across all the highways within Tamil Nadu. After he understands the seriousness behind the crimes, he approaches his superiors to investigate this issue further, but they advice him to let it go, until a MLA's family suffer the same fate.
Karthi faces a lot of troubles and goes to extreme extends to find those killers, Rakul gets caught in the web of hustels by mistake which endangers her life. The rest of the story revolves around how Karthi finds those killers and save Rakul.
Karthi has donned the police get up for the second time, and he completely slays it. He looks sauve with his fit and trained body. Likewise, he has nailed his performance too, though at times his voice sounds way too loud, he has pulled of the role of a sincere police officer with such ease. Rakul has delivered a neat down to earth performance as a loving wife, though she is through out the film, her role leans more towards a distraction. Bose Venkat plays a pivotal role and has delivered a convincing performance.
H Vinoth, has done a good job at the directorial department, and has to be applauded for trying to throw light to a heinous crime which took place between 1995 to 2005. The way his screenplay has been scripted in the second half explains the depth of investigation he has done on this subject. Yet, the movie could have been a little crisper and shorter and the first half feels to be draggy, even though the love sequences between Karthi and Rakul are on fire.
Sathyan Sooryan's has handled the camera, and his shots are innovative and appreciative. The most talented and underrated M Ghibran has provided the music, and his tunes are on point and sync with the film's genre.
In short, Theeran Adhigaaram Ondru, is a honest attempt at a cop film.