When Bijoya's son slips into a coma after suffering a suspicious fall at his college, the resolute mother pulls all stops to uncover a cycle of ragging and corruption and bring justice to her son.

Ekendra Sen was enjoying his vacation in Rajasthan with Bapi and Pramatha, suddenly a Professor of Archaeology at Oxford University Shatadru Ghosh informs him about his suspicion that a particular idol he had seen in London went missing.

Dhananjoy, a police detective, is drawn back into the case that ruined his life and career at the request of his colleagues. Reluctant at first, he dives head first into the case to nab the culprit after he finds some new and alarming clues. Arko, meanwhile, carries on murder after murder, seemingly taking inspiration from the five elements - earth, water, wind, sky and fire.

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.