A modern man, Vijay, marries his father's sincere secretary who hails from a poor family. But their stringent prenuptial agreement grants him the power to end his marriage after 12 months.
Selvam and Bhaskar, two thieves with good intentions, hide with the help of Radha who is an illegitimate child living with his father's family in the guise of a maid.
To obtain the "nagmani," a group of girls attacks a cobra pair. Unfortunately, the male cobra dies, and his partner escapes. Infuriated, she decides to take revenge.
