Watch Tenebrae Lessons for Free: How to Stream the Movie Online at 123Movies. . “The Nineties had a pretty bad start”, this is how Vincent Dieutre introduces us to the shadows of his personal universe in those years going through Utrecht, Naples and Rome. In these three cities and two love affairs guide a homosexual man on his nightly search for lost beauty. In a cross between a diary and a baroque play the film reconstructs the fragments of a fateful journey against a Caravaggio backdrop. Painting, sensuality, losing oneself in a cityscape: the Leçons de ténèbres form an obscure fresco, a white-hot collage of trashy vanity.