Watch The Airy Tomb for Free: How to Stream the Movie Online at 123Movies. . Can there be a bleaker portrait of a life half-lived? Cinematic treatment of poet R.S. Thomas's story of Twm, the "shy soul" who lives and dies alone in the "grim house nailed to the mountainside", oblivious to the interest shown in him by young girls in the village and to his own isolation as he scratches a living from the farm.