While still just a child, Piershad Kaiser faces his most terrible enemy, who kills his entire family in cold blood. At this moment, the young man plunges into a pool of darkness and hatred, and his soul awakens, revealing amazing abilities in the hero. It was then that the young hero finds the purpose of his life. The young man decides that he will do everything possible to take revenge on the offender and destroy his entire damned family. And along with them, all the terrible monsters that inhabit the “World of Souls.” At the age of eighteen, he is found by one of the strongest monster fighters in history and invites our hero, after passing a very difficult selection, to join the ranks of the extermination knights. But... What will Piershad Kaiser answer him? Is he ready to go on the most difficult journey of his life for the sake of his goal, in which he could lose everything? Are you ready to face terrible monsters, the most dangerous trials and the most amazing enemies?