Kathiresan aka Kaththi, a criminal, escapes from the Kolkata prison and comes to Chennai, where he comes across his doppelganger Jeevanandham, fighting for his life after being shot at by unknown men. Kathir decides to pass off as Jeeva and make away with a lump sum amount but once he realizes who Jeeva really is, Kathir turns a crusader.
A son decides to avenge his father, an army officer, who was falsely framed and killed by three corrupt officers. Fatefully, he also ends up falling in love with the daughter of one of the killers.
Jyothi Lingam, a bright student, leads a happy life in his small village. One day, tragedy strikes when his father, the only earning member of the family, dies in an accident.
