Siva(Prashanth) is admitted to a medical college in Chennai and his father(Rajesh), a police constable, gets a tranfer to Chennai too so that he can keep an eye on Siva. He develops a liking towards Mahalakshmi(Sneha), his collegemate. But Naga(Subburaj), Maha's servantmaid's son, is obsessed with making Maha his own.
After their father (Tim Robbins) is called into work, two young boys, Walter (Josh Hutcherson) and Danny (Jonah Bobo), are left in the care of their teenage sister, Lisa (Kristen Stewart), and told they must stay inside.
When the renegade crew of Serenity agrees to hide a fugitive on their ship, they find themselves in an action-packed battle between the relentless military might of a totalitarian regime who will destroy anything - or anyone - to get the girl back and the bloodthirsty creatures who roam the uncharted areas of space.
During a space voyage, four scientists are altered by cosmic rays: Reed Richards gains the ability to stretch his body; Sue Storm can become invisible; Johnny Storm controls fire; and Ben Grimm is turned into a super-strong … thing.