Dragon blood red, with a pair of strange blood-red eyes, a Chinese-American boy who was abandoned at birth in an orphanage in a slum in Manhattan, USA. One day, a bizarre incident killed the mentor who raised him and many other relatives and friends.
The young man began a long journey of exploration, not only to find the secret of his origin, but also to avenge his dead relatives and friends. On the night of his sixteenth birthday, the red moon, which is rare in thousands of years, suddenly appeared. Dragon Xuehong lost consciousness in the light of the red moon, and when he woke up, he was already in a strange world.
This is a world where humans, dragons, elves, orcs, demons and other races coexist. The civilization of sword and magic dominates the order of this world. Dragon Blood Red, who came to another world, fell into the hands of a slave trader. The other party took a fancy to the magical charm hidden in him and took him under his tutelage to train him as a devil trainer.
Demon trainers are underground products of this other world. They release the hidden desires in people's hearts and exchange fallen souls for power with demons. In order to survive, Dragon Xuehong became a first-class demon trainer. Uninhibited or glamorous, dissolute or chaste, beauties of all races and different personalities fell into the sea of immoral desire under his training.
However, Long Xuehong never forgot the purpose of his trip. After meeting Lin, the vampire princess of the demon clan, he began to have to face the cruelest truth...