Tragedy strikes his adolescent life when his father loses his hand when a doctor in an inebriated condition operates on him.

On his deathbed, his father gets a promise from Raja that he will turn his three brothers into a police officer, a lawyer, and a doctor.

The brothers are provided shelter and food by a local elderly woman (Paravai Muniyamma) whom Raja affectionately calls Paatti (transl. grandmother).

Now, Raja, in his adulthood, works as a bus driver, while his three brothers become a doctor, a police officer, and a lawyer as per his father's wish.

Thangapazham enters and stops the wedding by throwing a hand grenade into the crowd, causing people to run.

When she slaps him before his staff and patients, he brutally murders Lakshmi out of rage and sends goons to eliminate Paatti, the only eyewitness.

After learning this, Raja swears an oath to teach his three brothers a good lesson by betraying them while acting to be on their side.

During an award ceremony, Raja blackmails Paal with the previous pieces of evidence he gathered, forcing the latter to announce in front of the crowd that he will perform 100 free heart surgeries.

On seeing her in such skimpy clothes on a temple occasion, people get angry and start riots, thus making her eventually lose her minister position.

After Sandai (2008), Sakthi Chidambaram announced his next project called Rajathi Raja, the title derived from the 1989 film of the same name.

[1] Sakthi had acquired the rights of the title from Pavalar Creations, production company of music composer Ilaiyaraaja which produced the original film.

[3] Snigdha Akolkar was chosen for a role after Kajal Aggarwal, Pooja, Sandhya,[4][5] Namitha, and Lakshmi Rai all pulled out of the film.

[11] Initially, Dhina was selected as the composer, but he was removed and was replaced by comedian Karunas, who made his debut as music director in this film.

Nowrunning wrote: "Rajaathi Raja is such a bad film that the sequence of events in the movie would fail to convince even a three-year-old child".

[14] Sify wrote:"Sakthi Chidambaram’s Rajadhi Raja is the crudest masala movie seen in recent times".

[15] After the release, Chidambaram lashed out at Suhasini Maniratnam for giving the film a negative review on her show Hasini Pesum Padam.