Near Mt. Konpo, tunnel excavation work on the third-sector of the new Tokai Super-Expressway project unearths a huge cavern from which a large, strange stone is recovered. One worker claims to have seen a huge monster in the darkness, leading a young scholar to recall an ancient text kept in a local shrine. The legend tells of Gomess, a tusked, bipedal beast with fearsome claws, and a phoenix-like bird, Litra, which defends the order of nature against the other. When Yuriko and Jun become trapped in the caverns, they discover that this legend is not mythical when a rhythmic beating emanates from the strange stone, revealing Gomess.
