A 17-year-old boy walked off a soccer field with a secret that would tear his world apart. Yi Fei has always known he was different. The strength. The speed. The way his body changed under the full moon. But when he opens his father's long-lost letter on his eighteenth birthday, he discovers the truth: he is not just a werewolf. His mother was a vampire — a real one, born in the 18th century. He is the first hybrid in history. Hunted by a vampire lord named Rassente who wants to use his hybrid blood to resurrect the original evil, Yi Fei must master the beast and the bloodsucker within. Alongside Van Helsing, a mysterious hunter, and Camilla, a vampire with her own agenda, Yi Fei crosses continents — from high school hallways to the catacombs of Rome — to stop a war that would consume both human and supernatural worlds. | But the greatest battle isn't against the ancient darkness. It's the one in his own heart. Can a half-monster protect the people he loves? And what must he sacrifice to save them?