Requiem for a Dream (2000)

Nightmares might be scary, but they don't compare to a dream unfulfilled. Each main character in Requiem is faced with the challenge of reconciling their dreams with reality and each fails in the most tragic way possible. Aronofsky's magnum opus is evidence to the fact that the chasm between dreams and reality can be subsuming and catastrophic.
- By Zachary Goldbaum / Source: Filmjabber.com