After mobiles start mysteriously flying out of the hands of people in Chennai, Dr Vaseegaran summons his trusted robot Chitti to ward off the bird-shaped supernatural powers of Pakshirajan.
8 years after Chitti was dismantled due to destruction he caused. Vaseegaran has created new human robot Nila which can understand human feelings better. The cell phones in the city start to disappear from everywhere. A creature in the form of bird creates havoc in the city causing destruction. Vaseegaran believes it to be the fifth element force and decides to get Chitti back in action. When Vaseegaran traces the location of missing cellphones with help of Chitti and Nila he finds that its not the fifth force but a human force done by late professor Pakshi Rajan.
When mobile phones start mysteriously flying out of the hands of people in Chennai, Dr Vaseegaran and his android assistant Nila are called in for help. The city is under a threat from the supernatural powers of Pakshirajan, a deadly winged monster seeking revenge on mankind for harming birds with mobile radiation. Dr. Vaseegaran is forced to reassemble his robot 2.0, the upgraded version of Chitti to fight against Pakshirajan and save the world.