Tsubaki Hoshi witnessed his father being mercilessly beaten and murdered by his very own family, which contained some of the most powerful spirit beast masters in the world, at the young age of 13. Tsubaki let his rage and anger overcome him, as he mercilessly cursed the family's grandmaster, which resulted in him being kicked out of the kingdom and the Hoshi family. His search for strength and power, so that he can avenge his father, has only begun, but as he became stronger, his anger brings out a demon in him that cannot be controlled. Will he let his anger get the best of him and limit his power? How strong will he get? Will he get his revenge?