Young drummer attending a music academy is 'tortured' by his mentor (a music world's R. Lee Ermey) to become the greatest. There's two perspectives: 1) Drummer's side: will you sacrifice everything (and I mean everything) to become the greatest in your field? 2) Mentor's side: How far do you push your prodigy to become the greatest? How far is too far? The uniquely absorbing film leaves these questions unanswered (because they're probably unanswerable), and assigns the task to you. It's the movie that will shoot Miles Teller to stardom, and likely earn J.K. Simmons a Best Supporting Actor Oscar.
"There are no two words in the English language more harmful than 'good job'."