After what has been dubbed as the "Black Sun Event", the world of humans is now aware of the terrifying existence of monsters. Vampires. Werewolves. Witches. But even with more opened eyes watching as their world evolved into something stranger, humans were still blind to the world of creatures much more powerful: DRAGONS! Among the blinded is eighteen-year-old Samuel Redfield, who is wanting to start over in life and moves in with his adoptive older brother, Edward Redfield, in London after the death of his adoptive parents.
Everything seemed to be going well for Sam until a school field trip to a newly built museum changes the course of his life forever. The two worlds of dragons and humans comes into a collision when the deadly dragon, Belrax, "The Storm Bringer", merges with Sam's mind, body, and soul. After being entangled in the world of knights and dragons, Sam learns that he is the last blood descendant of King Arthur, and the sole yielder of the legendary sword, Excalibur. Though the two have conflicts because of their differences, Sam and Belrax must learn to coexist as one if they hope to stand a chance to save both worlds from a looming doom that could end everything.