Kochadaiiyaan movie is based on Pandiyan king Kochadaiyan Ranadhiran (710-735 A.D). 'Kochadaiiyaan' is the story about how mighty warrior Rana fights to restore his father Kochadaiiyaan's lost glory. The rustic voice introduces us to the two warring kingdoms of Kalingpura and Kottaipattanam to the south of the country. It's after one of the many bloody battles between the two dynasties that we see a little boy running away from his brother, with blood smeared on his face. The citizens of the kingdom ruled by the senior Rajinikanth have nothing to worry in life and are enjoying all the pleasures under the sun. The king now becomes a victim of a plot hatched by one of his own men (Jackie Shroff), who plays the kingpin in the plot. Then Comes Rana, who impresses us and the king of Kalingpura with his gallantry. He goes on to win many battles for Kalingpura and gains the trust of King Mahendra Raj (Jacckie Sharoff) and his son Veera Bhadra. He then convinces them to wage a war on Kottaipattanam, using the men they had captured from that kingdom. It's only on the battlefield that Rana announces his solidarity to Kottaipattanam. While King Rishikodayan (Nassar) embraces Rana, the prince rewards his friend and his heroism with the title of the 'commander in chief'. Rana's real sacrifices and his resolve to ensure his father Kochadaiiyaan's legacy remains untarnished. His love interest is Vadhana Devi played by Deepika Padukone. How Raana and Sena defeats the enemy and gets his kingdom is rest of the story which leads to the climax.