In a world where humans can't see and wield the power of Soulbound beasts, strength comes with a dangerous price. Alex Kakusei is a reckless thirteen-year-old with a mysterious power sealed within him. As he begins his journey to become Soul Grand, he discovers that the world is far more dangerous than he ever imagined. Between powerful clans, deadly Soulbounds, ancient secrets, and enemies who want to control the power that this world has,Alex must learn one thing: How far will he go to protect the people he loves before the power inside him consumes him? The journey of a young Soulbound begins now.