After his parole, he embarks on a mission of vengeance, while being chased by a tough and strict cop Keerthy Suresh, who is determined to find out the truth behind his actions.
The film, directed by Arun Madheshwaran, is a historical drama that depicts the struggle of the oppressed castes for the right to enter temples, a basic human right that was denied to them for centuries.
Dhanush, who plays the titular role of Captain Miller, a rebel leader who fights against the oppressive colonial rule, and Kannada superstar Dr Shivarajkumar, who plays his mentor and ally.
Based on real-life incidents, the film portrays the rich history and culture of the region, as well as the exploitation and oppression faced by the workers.