Thoongaa Vanam (Eng: Sleepless Forest) is a 2015 Tamil action film Directed by Rajesh M.Selva. Kamal Hasan produced the film with some of his eminent collegues like S. Chandrahasan, Gokulam Gopalan and V.C. Praveen for Raaj Kamal Films and Sri gokulam Movies. The Telugu and Tamil versions of the film were produced simultaneously and released. The film features Kamal Hassan, Trisha, Prakash Raj, kishore and Asha Sarath in lead roles. The film released on Diwali day. It was actually an adaptation of 2011 French film ‘Sleepless Night’ direted by Frederic Jardin.

This film unfolds the story of a police officer who goes through many struggles in order to prove his innocence and fight against the drug mafia. Diwakar (kamal Hassan)  and his assistant Mani (Yugi sethu) are very sincere officers works in Narcotics Department. They seized a big quantity of cocaine from a narcotic mafia king, Vittal Rao (Prakash Raj), who was very criminal minded man and was always in rivalry with Diwakar. Vittal Rao suffered a huge loss and in retaliation he abducted Diwakar’s son Vasu ( Aman Abdullah).  He demanded the cocaine back, in order to release Vasu unhurt. But Diwakar tries many ways to save his son from Vittal’s custody but all failed. At last he decided to returne the cocaine to the culprit and save his son. But actually he had some hidden ajenda to trap him. Without knowing it his colleague Mallika (Trisha Krishnan) suspects him thinking that he is involved in drug smuggling, informs the affairs to her superior and carry away the cocaine hidden by Diwakar. Diwakar was in a dilemma.  Can he save his son by convincing his innocence? Is Mallika passed the information to the right person as she believed? There comes some unexpected twist that makes the story to the top of anxciety and a watchable one.

The film received many positive reviews. They praised the director for combining so much suspense and excitement in right prepotion.  It opened a new way in the investigation history. The performances of Kamal Hassan and Trisha were widely applaused and the back ground score of the movie by Gibran was fantastic. The relation of the story to the present day occurrences are absolutely truthful and show the present downfall of the society towards corruption. Highly reputed officers who are at the top of service, assumed to be unviable  to money, power and influence, are seen very much obsessed to it and leading the younger generation to the hands of so called drug mafia. They are ready to do anything, even to betray the nation without any prick of conscience. They shoulder with the culprits to spoil the younger generation of the country, not knowing that their little ones are also attracted to this trap one by one. As Gautam Bhaskaran of Hindustan times says; “ It is an absolute slick crime Adventure film”.  Again as Filmbeat concluded, “Without any songs and romantic sequences, Toongaavanam is not your regular Tamil film. After all, who else will other than Kamal Hassan can make a Kollywood flick look truly international?”.