Maattrraan is a 2012 Tamil action thriller film directed and co-written by K. V. Anand and produced by Kalpathi S. Aghoram along with his brothers Kalpathi S.Ganesh and Kalpathi S.Suresh. It stars Suriya who portrays conjoined twins, along with Kajal Aggarwal in lead roles while Sachin Khedekar and Tara play supporting roles.
Ramachandran (Sachin Khedekar) is a genetic scientist who doesn't get due credit and funds for his research. He tries creating a human with several talents through baby designing, which thus leads to the birth of his sons, who are conjoined together above the waist. Since they share a common heart, doctors suggest a sacrificial surgery, to which their mother Sudha (Tara) objects. They begin raising their children, Vimalan and Akhilan (both played by Suriya). In the following years, Ramachandran makes it big with the help of Sudha. His company, Locus Lacto Products, makes huge profit through their product “Energion”, the top-selling children’s powdered milk energy drink in the market.
Vimalan and Akhilan are poles apart in character, the former being decent and good at studies while the latter is care-free and poor at studies. Anjali (Kajal Aggarwal) joins their company as a translator. Both Vimalan and Akhilan fall for her. She, along with her Russian friend Volga, a journalist, spend their time with the brothers. Meanwhile, Anjali falls for Vimalan and Akhilan is happy for them.
Vimalan is declared brain-dead and his heart is transplanted into Akhilan. After the twins are separated through a surgery, Anjali grows closer to Akhilan. Sudha is warned that Energion is adulterated and she confronts her husband who asks the food safety department to raid their company. But to her surprise, Energion is declared safe and hygienic. Meanwhile, Akhilan discovers that his father is behind Vimalan’s death by tracking his assistant, Dinesh (Ravi Prakash). He gets hold of the pen-drive that contains several photos, where ingredients used as cattle feed at their farm are declared as no feed. The beginning of the scheme is traced back to the fictional republic of Ukvania.
Once they are in India, Ramachandran is exposed and is about to be arrested. Akhilan requests his father to surrender but however, he discovers his father’s ugly side and finds out that he and his brother are just a result of their father’s failed experiment. Ramachandran also states that he used the whole society as his research lab, through Energion. His leg is then crushed by a rock after being unsuccessful in killing his son. Akhilan then leaves his father to die at the hands of rats which chew on his flesh.
Akhilan gets National recognition for bravery. He later gets married to Anjali, and the couple subsequently become parents to conjoined twins.