While the inspiration for the piece comes from the Book of Revelation, there is a glimmer of hope at the end. There are eight movements, and it helps to read Messiaen's notes, which can be found here. Lawrence University has a site covering musical elements, analysis, and Biblical notes.
You can watch a recording of the performance at the Wigmore Hall channel (also embedded below). The performers from the Kaleidoscope Chamber Collective are Matthew Hunt (clarinet), Elena Urioste (violin), Sheku Kanneh-Mason (cello), and Tom Poster (piano). The live portion starts around the 4:30 mark and the performance lasts just over 50 minutes. All players are excellent and shine, but due to the nature of this piece Kanneh-Mason and Hunt really stand out. Enjoy.