One hundred years ago, there was a great war between humanity and beastkind. Once the war ended, an annual tradition was proposed where a female sacrifice would be taken from the humans to be eaten by the King of Beasts. This tradition continues on as the 99th sacrifice, 15-year-old Sariphi, is taken from her village to the kingdom of Ozmargo, a miasma-filled realm where beasts live and human entry is forbidden.