This film is supposedly based on the true account of a prisoner who escaped from Devil's Island in French Guiana. However, the book by Henri Charriere about his experiences apparently has a LOT of inconsistencies and outright fabrications (a polite way of saying he was a liar). So, provided you understand that this isn't quite a true story, this is still an exceptional film. Much of this is due to incredible acting, direction, scripting and makeup.

Henri Charriere, played by Steve McQueen, is going to Devil's Island for killing a pimp--supposedly in self-defense. On the boat, he meets a swindler played by Dustin Hoffman and they become friends.

Most of the film documents how harsh and awful life is in the prison came--either in the work camps or when living in solitary confinement. All take their toll and kill off many of the prisoners, by Charriere is resilient. Despite all these privations, he never loses his resolve to escape, though Hoffman eventually does and accepts his life on the island after one failed escape attempt. In the end, Charriere does escape, though in real-life, this apparently did NOT occur.

While there is a lot more to the movie and what I have mentioned (after all it's a very long and involved film), the full impact of the story is not what you read but seeing the awfulness of the prison. So, be prepared for a movie that at times is very difficult to watch but is constructed it's an amazing film.