Ramachandran (Sachin Khedekar) is a genetic scientist who is a genius. His wife delivers conjoined twins Akilan and Vimalan (Suriya in dual role). After the birth of his children, Ramachandran's life changes for the better and soon he becomes a multimillionaire as his energy drink -Energion, a memory booster becomes popular and he sets up huge plants to manufacture it. Meanwhile the Siamese twins grow up into young men. Though they are stuck together, they are as different as chalk and cheese. Akilan is a cool, chilled out guy who celebrates life and lives it up while Vimalan is the shy introvert who believes in socialism. Around this time foreign companies try to steal Energion formula which is closely guarded. A Russian woman with help of a beautiful interpreter Anjali (Kajal Aggarwal) tries to trap the twins, which leads to a dangerous situation that gets out of control.