A Passage to India (1984)

This epic film tells the story of a colonized India that is nearly ready to revolt the the personal story of some Brit ex-pats and local nationals.

Adela travels to the interior of India to become engaged to a British city magistrate. She befriends an Indian professor who is so smitten by the fact that a white woman would take the time to befriend him that he decides to extend incredible hospitality to her. He invites her on a trip to see a set of caves. The result is catastrophic and the entire empire goes on trial.

It helps that the film is based on a thick novel giving it incredible depth. Some of the events are somewhat difficult to piece together, but the thread holding the film intact is the parallel of one people's subjugation of another and the one thing that can mend the brokenness.

IMDB