In retaliation, Vittal Rao, a drug lord, who was due to receive the shipment, kidnaps Diwakar's son Vasu.

With no other option at hand, Diwakar agrees and proceeds to Vittal's nightclub, with the bag of cocaine, where Vasu is held hostage.

Three months later, Mallika is now Diwakar's deputy, and the duo is shown thwarting the attempted murder of a police officer.

Kamal Haasan announced that his next project, a bilingual thriller titled Thoongaa Vanam in Tamil, would be directed by his former assistant Rajesh Selva and produced by himself.

[citation needed] Kamal Haasan was reported to be play CK Dhiwakar, an Indian Revenue Service officer in Narcotics Control Bureau.

[13] Trisha and Prakash Raj were the first actors to be cast and reported to play the female lead and an important supporting role respectively.

[14][15] While Prakash Raj was said to portray a drug dealer named Vital Rao, Trisha's role was Mallika, a police officer.

[23] The soundtrack album for Thoongaa Vanam composed by Ghibran, features only one song, "Neeye Unakku Raja" in the heavy metal genre, written by Vairamuthu and sung by Kamal Haasan, with backing vocals by Yazin Nizar and model-turned-singer Aishvarrya.

[citation needed] Gautaman Bhaskaran of Hindustan Times gave the film a rating of 4/5 stars, calling it "an absolute slick crime adventure".

[27] Rating it 3/5 stars, S. Saraswathi of Rediff appreciated the performances of the lead cast as well as the film's technical aspects but criticised the lack of pace in the film's screenplay before concluding "the intriguing plot, good performances, Ghibran's innovative background score and camera angles of Sanu Varghese make director Rajesh M. Selva's Thoonga Vanam [sic] worth a watch.

"[29] Karthik Keramalu of IBNLive gave 2.5/5 stars and wrote, "Actors move in and out of rooms, run this way and that, plot and fail, hide and seek.

[31] Sify described the film as a "classy thriller that gives an edge of the seat ride with world class action sequences and no-nonsense execution!".