An adaptation and continuation of Stephen King 's novel series of the same name , the film stars Idris Elba as Roland Deschain , a gunslinger on a quest to protect the Dark Tower—a mythical structure which supports all realities—while Matthew McConaughey plays his nemesis , Walter Padick / the Man in Black and Tom Taylor stars as Jake Chambers , a New York boy who becomes Roland 's apprentice .
Stephen King 's novel The Dark Tower was adapted into a film .