Madhu, an animator, gets thoughts about her past life, but her psychiatrist believes it to be a figment of her imagination. Madhu happens to meet Ashwin, the man she was in love with in her past life.

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.