Dasavathaaram English The Ten Avatars is a 2008 Indian Tamil science fiction disaster film, directed by K. S. Ravikumar. It stars Kamal Haasan, who also wrote the screenplay and story of the film, in ten distinct roles. Asin appears in two roles and Mallika Sherawat plays a subsidiary role. The film, which had been under production for nearly three years, was produced and primarily distributed by Venu Ravichandran. Primary filming locations included the United States and across Tamil Nadu in India. The soundtrack to the film was composed by Himesh Reshammiya and the background score was by Devi Sri Prasad.

Bioscientist Govindarajan Ramaswamy speaks at the Jawaharlal Nehru Stadium about chaos theory and the butterfly effect. He begins by reciting events from the 15th century in Chidambaram, when King Kulothunga Chola II, a Saivite, persecutes Vaishnavites and intends to destroy an idol of Govindaraja. Rangarajan Nambi, a Vaishnavite, protects it and offends the king, who orders Rangarajan to be executed by being submerged into the sea with the idol, succeeding.OnDecember 2004, a biotechnology lab in the United States designs a virus intended as a bioweapon. After understanding its potential, Govind, one of the scientists involved, refuses to give the vial containing the virus away due to fear of misuse. However, his boss Sethu has other plans and tries to sell it to a terrorist group when Govind flees with it. Former CIA agent Christian Fletcher follows him and attempts to seize the vial, when it is accidentally couriered to India. Govind sneaks into the aircraft carrying the virus and changes its location. After arriving in India, he is questioned by Balram Naidu, a RAW operative. Govind unsuccessfully tries to explain the series of incidents. ........

Source: Wikipedia