S1E1 · Jan 17, 2021 · 46 min

Hibiki Mamiya, an auto mechanic living at the southern tip of the Miura Peninsula, is an upright and trustworthy man who plans to propose to his girlfriend, Kurumi—an intern doctor with whom he lives. While on his way to work, Hibiki becomes trapped following a mysterious tunnel collapse. When he finally escapes the tunnel days later, he is confronted by a chilling, desolate, and deserted cityscape.