This vast world is a home to all sorts of life. For decades humans have been hiding in the shadows of predators of this world - Monsters. Overtime, humans developed powerful technology and took the top seat of a predator themselfs. Their arrogance and greed prevailed, disturbing nature's balance.
Young hunter Iyora with her assistant Wrio is on her first hunting job. Passionate, she believes in being capable of taking on a powerful Monster all by herself. 
After arriving, the mysterious beast she underestimated almost kills her. Yet, instead of bringing an end to her, the monster spares her and shares some forgotten history about Hunters and Monsters.