Complex sentence: The movie's title character Odd Horten is a habit-bound train driver, who ends up in an unexpected situation on the day of his retirement, and is forced to reconsider his life.
Split into simpler sentences: The movie's title character Odd Horten is a habit-bound train driver, who is about to retire. On the day of his retirement he ends up in an unexpected situation, and is forced to reconsider his life.