66 Sadashiv is an emotional yet humorous story of Prabhakar Shrikhande, a typical Punekar who starts an institute to spread the awareness about mastering the techniques of a new art form and is trying to gain recognition for the same.
Based on the Maratha warrior Hansaji Mohite who was later given the title of Sarnobat Hambirrao, the film portrays his life as the Commander in Chief of Chatrapati Shivaji Maharaj's army.