Kaali, a hostel warden, is a happy and cheerful personality who is loved by one and all. His style and charisma has people fawning over him. He nurtures beautiful relationship with all people alike and even has a tinge of romance infused into his life. All seems well but there is something lurking. There is more to the man than meets the eye. A strange aura of mystery surrounds Kaali who has few surprises stored in him for everybody. And soon, the game begins. What follows is a tale of action and adventure. Petta is a high-octane entertainer action drama which celebrates the larger than life personality of Super Star Rajinikanth.