Set during the lockdown, Umayal Karthika deciding to spend time at a 100-year-old unkempt library in a bid to divert and heal from a heartbreak. From the sea of books, she picks up Karungaapiyam and with her reading different chapters, and her imagination about the stories comes to life.

Irfan, an innocent Muslim chemical engineer with an ordinary life, is caught in inexplicable circumstances, when accused of being a most-wanted terrorist, that alter his life & everyone around him.

A cool-headed crusader for the struggling engineers, Raghuvaran faces the powerful and arrogant owner of a construction company Vasundhara Parameswaran, as they engage in a battle to win the corporate game.

Centers on secret intelligence agency cases involving five major national threats that were thwarted through covert operations.