The film tells the story Unniyarcha, the valiant heroine of the Vadakkanpattu, though a member of the fairer sex, she masters martial arts and proves herself as an equal to her brother Aromal Chekavar and cousin Chandu Chekavar, both renowned warriors. Unniyarcha is portrayed as the embodiment of all virtues. The film also narrates how jealousy takes its roots in the mind of Chandu, and how he grows hostile to Aromal, consequently betraying him during a duel. Chandhu always attracted to Unniyarcha who always hated him for his cheating behavior. Unniyarcha marries Kunjiraman in spite of Chandhu's objection. Chandhu leaves Puthuram Tharavadu and goes to Tulunadu. Now Aromal has to fight with Aringodar who is an experienced fighter. Aromal Chekavar's father calls back Chandhu as second hand for Aromal for the fight even though it was objectied by Aromal and Unniyarcha. Aringodar encourage Chandhu to make a defective sword for Aromal. During the fight between Aromal and Aringodar, the sword of Aromal brakes into two pieces. Aromal ask Chandhu to give his sword but Chandhu tells he has not taken. Then Aromal throws the broken bigger sword piece at Aringodar which cuts the head of Aringodar. Now at Puthuram Tharavadu, everyone sees a fatally wounded Aromal come out of the palanquin and tells that Chandhu had cheated by stabbing him while sleeping. Unniyarcha then pledges to take revenge for this betrayal till then she never tie her hair. Now Unniyarcha trains his son Aromalunni who grow to become a brave fighter along with Aromal's son Kanappanunni. Now both the sons are sent for a kalari. Here the local boys try to attack Aromaluni due to jealousy of his rich status. Aromaluni and Kanappanunni defeat everyone but the elders ask them to show their skill by defeating Chandhu, which matter their mother have never told. Now aromaluni asks mother to reveal the killer of his uncle. Uniyarcha reveal everything. Father Chekavar first refuses aromaluni and kanapanuni to go for revenge fearing Chandhu is skilled in 18 techniques of kalari. So the father teaches them the 19th secret technique. Chandhu finally get ready to fight with the sons of Puthuram Tharavadu. Finally after long fight, Aromaluni tells the 19th secret technique of the kalari he going to fight. He lifts a dust cloud around Chandhu's head finally slaying the head of Chandhu. Aromaluni and Kanappanunni go with the head of Chandhu on a plate and hands over to Unniyarcha.
Cast
Kunchacko Boban as Aaromalunni, Unniyarcha's son
Vani Viswanath as Unniyarcha
Devan as Chandu Chekavar
Siddique as Aromal Chekavar
Captain Raju as Kannappa Chekavar, Unniyarcha's father