Sivantha Mann

The Portuguese want to set up an army base in Vasanthapuri, a zameen in Tamil Nadu, India. They approach Diwan (M.N. Nambiar), a corrupt citizen of the area and decide to make him the king if he agrees to carry out the plan. He subsequently agrees, but none of the local people are happy and protest against this. Hence he starts killing them in large numbers. One of the civilians Anand (R. Muthuraman), who lost his father in the shootout, swears that he will have revenge for the outrage when his close friend Bharath (Sivaji Ganesan), son of a General (S. V. Ranga Rao) returns from abroad. Meanwhile Chitralekha (Kanchana), the princess of Vasanthapuri is living in Zurich, and is completely unaware that her zameen is in danger. She sees Bharath's photo in a local daily, and finds out that he is also from Vasanthapuri. She reads that he came first in the University of Bern, and develops interest in meeting him. That night, Chitralekha meets him at a club and congratulates him for his performance, while introducing herself as "Vasanthi" to hide her true identity. Quickly, they both fall for each other.

They both enjoy as they start touring all over Europe, but suddenly Chitralekha's life takes a drastic turn: She hears about the danger in her zameen, and hence she has to return. Bharath also agrees to come, as he is also determined to save Vasanthapuri. During the flight, one of the flight attendants (Thengai Srinivasan) announces that Diwan wants to marry the princess and will hence receive her at the airport. Chitralekha is not happy and commands that the flight take a different turn, but the attendant stops her from trying to escape. Bharath however supports Chitralekha and fights the attendant, causing the flight to continuously spin and in the process, the flight drowns in the sea. Bharath and Chitralekha are presumed dead, and this results in the dismay of their parents. The two are however washed ashore onto an island and are unconscious. They are cured by two local doctors who befriend them, and arrange a special raft for their return. Bharath realizes that Vasanthi is actually princess Chitralekha, but she advices him just to see her as his lover and not as the princess.

They both arrive at Anand's house, and he is surprised to see Bharath alive. However, Chitralekha takes the guise of a normal girl because she does not want anyone to know that the princess is still alive, and to aide Bharath. Her true identity remains a secret to everyone except Bharath. The next day, people again protest at Diwan who starts killing them all, but Anand dies in the shoot out, claiming that his death will be honored as a sacrifice and that the zameen would be avenged by Bharath. Meanwhile, Anand's mother also dies in the shock of her son's death, making Bharath and his friends more determined to save their zameen. They kill a few of Diwan's men, and seek shelter in a bar owned by Nagesh, who also becomes their ally. How Bharath, Chitralekha and the rest of the gang secretly deal with Diwan and his army forms the rest of the story.