Troubles worsen for Kumaresan after the capture of Perumal, and soon he is confronted with having to make a choice between performing his duties as a police constable, or taking a stand for what is right.

In Viduthalai: Part I, a police officer is recruited to capture the leader of a separatist group. The officer faces numerous challenges as he navigates through the dangerous world of espionage and terrorism. With time running out, he must race against the clock to bring the leader to justice and prevent a catastrophic event from taking place.