Divine Warrior is the first volume in a trilogy that follows "Jimmu", the son of a poor blacksmith who dreams of one day becoming a samurai. However, Jimmu was born into the wrong social cast and cannot ascend to the heights he so desperately desires. Yet, through deep personal tragedy Jimmu is given this opportunity and aligns himself with the local Sensei of a kenjitsu school who teaches Jimmu the ways of swordsmanship. As child prodigy, Jimmu becomes a deadly master of the sword. Jimmu grows into adolescents with his friend Yukio, an archer of exceptional skill, and Sato whose shadowy skills are somewhat of a mystery to the young warriors. All the while rumors abound of a nation of nomadic barbarians have landed on their shores. The "Boar" are a blood thirsty people who worship battle, cruelty and mutilate their faces to seem more like beasts then men. Having been defeated once before, the Boar have once again set their gaze upon the small island nation of Nihon. Assisted by the traitorous Lord Hookum, the Boar gain a foothold into the land of the Samurai. Lord Hookum's senseless ambitions and hunger for power blind him to the dangers of the Boar's treachery and lust for conquest. The invasion begins just as Jimmu's dreams come to fruition only to be put immediately to the ultimate test.