The Kolathiri Raja (Thikkurisi Sukumaran Nair) is a prosperous ruler of Northern Kerala. Prince Udayan (Prem Nazir), Raja's second nephew, is handsome, brave and intelligent than Prince Devan (Madhu (actor)), Raja's elder nephew. The King named Udayan as his successor to the throne in accordance to matrilineal traditions along with marriage of his daughter Princess Parvathi (Lakshmi (actress)), who was in deep love with Udayan. This has dashed the hopes of Devan, who secretly admired and longed to marry Parvathi.