For centuries, beings called Shokujinki have lived in secret among humans. Although they appear human, Shokujinki can transform into uncontrollable beasts with massive claws and must consume humans to survive. The equally secretive Kifuuken dojo specializes in killing Shokujinki by severing their arms, serving as the sole barrier against unchecked Shokujinki domination. Toshihiko Momota, son of the Kifuuken leader, is immediately captivated by a mysterious woman named Yuka Kamitsuki. Their relationship is complicated, however, because neither knows that Yuka is a Shokujinki and Toshihiko is sworn to kill her. Meanwhile, the Kifuuken faces a crisis of confidence as Toshihiko's brother Kazuma challenges tradition and attempts to modernize the dojo. As tensions rise and secrets from both the past and present are uncovered, who will survive, and who will be eaten?