"Spirit Contract" is the ability to make a contract with a powerful spirit and receive its divine protection. However, Kyle, who possesses a strange and "mysterious flame," accidentally burns a spirit to death and is banished from his party. Filled with despair, Kyle begins the journey back to his hometown. Along the way, he comes across a girl being attacked by a monster. He tries to help, but without a "Spirit Contract," he is too powerless... Just when things seem hopeless, the girl suddenly reveals her true identity. She is a legendary "Dragon Spirit"?! When the feared "Spirit Killer" meets the "Dragon Spirit," a battle for the fate of the world begins!