Ten years ago, Kane, the legendary "Original Wolf King" who once shook the world, is released from prison on a special mission. He travels to Grey Harbor to secretly guard Ella, his late cellmate’s sister, hiding his true identity as a lowly cleaner in the fighting arena.When the ruthless Obsidian Consortium and local tyrants push Ella to the edge, she nearly burns out her life using a forbidden spell to protect her brother’s legacy. To keep his promise, the seemingly useless Kane unleashes his invincible power, crushes all foes, seizes the sacred relic to forge a life crystal, revives Ella, and finally vanishes into the wilderness with her.
