Eight years after Chitti was dismantled due to the destruction he caused, Vaseegaran has created a new human robot, Nila, who can understand human feelings better. When cell phones begin disappearing across the city and a bird-like creature wreaks havoc, Vaseegaran believes a fifth-element force is behind it and decides to bring Chitti back into action. Following the trail of the missing phones, he discovers that the culprit is not a supernatural force but a human one: the late Professor Pakshi Rajan.