In a world where demons that are out of human sight run rampant across Earth, a young powerful man emerges, Dauragon. He is recruited by a secret organization, the International Defense Department, which works directly for the U.N. Everything about his familyas distant past is unknown. He possesses a broad sword that his father gave to him. The I.D.D. has been watching him for years and is interested in the special powers and techniques that he possesses. They believe that he can help them stop an upcoming demonic threat that has the power to throw the entire planet into darkness. He and his nine new comrades must team up and endure pain, frustration, and being lost as they struggle to stop the endless onslaught that their foe throws their way. His powers grow beyond any comprehension, but still arenat strong enough. Thereas just one piece of the puzzle that heas missinga].