Sinking is a story about the inner world of a man that's experiencing Kodokushi. Yamasaki, a nobody disconnect and forgotten by society, Isolating himself inside out, not willing to accept any helps, Sinks deeper into the void as the reality blur with his imagination and eventually is devoured by the madness he built himself. Was it worth it to live a life being forgotten or to end it in a in a sparkling moment in the once imagination?