In the 20th century, an all-out war occurred between the human race and the monsters. The defeated humans left behind the hope of the human race, the Soldier of Meros. As passed, this has been forgotten. However, one day, a high school student named Bocca, who yearns to be a warrior, suddenly awakens as a Soldier of Meros. He embarks on a journey to find a girl by the name of Bokyaku no Senritsu, who only the Soldier of Meros can see.