Born from a golden-marked black egg, Belle, the half-dragon princess, escapes the Church’s execution with her mother Una. Hunted by Lawrence and the false Saintess Cynthia, she finds her father Max, the Black Dragon King, and uncovers a conspiracy to use her family’s blood to open the Divine Gate. With courage, fire, and loyalty, Belle unites dragons, humans, wolves, and beasts against the real enemy. She enters the gate, survives the darkness, and returns as the bridge between two races. In the end, war ends, her parents reunite, and Belle becomes the first heir of a new peaceful world.