"The Man Who Knew Infinity" is a biographical film that tells the story of Srinivasa Ramanujan, an Indian mathematician who made significant contributions to mathematical analysis, number theory, and continued fractions. The film explores his journey from India to Cambridge University in the early 20th century, where he faced cultural challenges and skepticism from the academic community. The narrative highlights Ramanujan's collaboration with the renowned mathematician G.H. Hardy, who recognized his genius and supported his work. Their partnership led to groundbreaking discoveries, showcasing the beauty of mathematics and the struggles of an extraordinary mind seeking recognition in a foreign land.