This is a bio pic about Srinivasa Ramanujan. I have read the book man years ago and it is very popular among the Indians, Indian techies and south Indians. His life is a heart breaking story of a poor self thought mathematician. Ramanujan found a book of some 800 mathematical identities, used for cramming for the British Civil Service examinations. From that book that stated the identities without any proof, he taught himself mathematics, rediscovered many theorems that were life time achievements for the discoverers. Completely unschooled in formal mathematics, he did not know how to prove any of his discoveries.
Educated Indians and British civil servants and professors in Madras (now Chennai) India recognized his talent, despite him failing in all subjects save math in college. They helped him get a job as a clerk and he wrote to at least four British math professors. Finally Hardy was intrigued, many of the things this unknown clerk claims to have invented were already well known theorems, just stated differently. Hardy suspected a hoax first, then eventually was persuaded that Ramanujan's talent was real.
The movie starts at his point and ends when Ramanujan leaves England. Decent movie, given the heavy subject matter, it can't be done any differently.
I would strongly recommend the techies to read the book, but catch the movie too. Paying 8$ bucks at the box office, will encourage more movies about scientists to be made.
[ I am proud to have a very tenuous minor connection to Ramanujan. Both Ramanujan and I "belong" to the same temple, i.e. share the family deity. ]