In a world populated by strange and dangerous creatures, Tatsumi is a young country boy in search of dream and adventure. One day, he decides to go to the capital in order to engage in the imperial army, make a fortune and save his village ravaged by poverty. But he will quickly disappoint by discovering that the capital is not the dream place he imagined. Moreover, his encounter with the group of killers of the Night Raid will probably change the course of his destiny: he himself will become a murderer in order to rid the capital of the infamous who corrupt the entire country.