Set in the 1880s, the story of how, during a creative dry spell, the partnership of the legendary musical/theatrical writers Gilbert and Sullivan almost dissolves, before they turn it all around and write the Mikado.
Maybe you have to be into theatre, and musicals in particular, and/or enjoy a history piece on Gilbert and Sullivan, but the movie is very uninteresting. Moves at a snail's pace, goes for 2 1/2 hours, and nothing really happens. What does happen, you know already, from the provided synopsis.
Director Mike Leigh could at least have made it shorter, rather than an endurance test.