Based on the best-selling book series by highly-acclaimed author Stephen King, in the parallel realm of Mid-World, the once-respected Gunslinger Roland Deschain, has abandoned his ancient oath to protect the Tower that is being threatened by the Man in Black who seeks to destroy it and life across the universe. In New York City, teenager Jake has recurring visions that signal the end of the universe and when he stumbles upon a hidden portal he travels to Mid-World, meets Roland and the two must embark on an adventure to find the Man in Black and save the Tower.