Xiao Hei, a boy from Qihang Orphanage, is injured in a fight on a rainy night and suffers a persistent high fever. He recovers a week later, but loses his sense of smell and taste. His only family, his younger sister Yingzi, is left unconscious after a head injury. He vows to take revenge. While searching for the culprit, he scrambles to find money for his sister's expensive medical bills. One day, he finally collapses outside Sunshine Hospital. Fortunately, he is rescued by its director, Professor Feng Gang, an internationally renowned brain specialist. Professor Feng is astonished and fascinated by Xiao Hei's extraordinarily powerful brain waves. The siblings are admitted to the hospital, and Professor Feng covers the cost of the younger girl's treatment, giving them both a secure place to stay. By day, Xiao Hei works as the director's private driver and assistant. After midnight, he helps Professor Feng enter patients' dreams and destroy their nightmares, freeing them from their inner demons and bringing them back to the real world. This also earns the hospital enormous profits. The two become true friends.
As he ventures into dreams again and again, Xiao Hei masters the incantations of The Duke of Zhou's Dream Lore and becomes a nightmare butcher feared by dream demons. Despite his extraordinary abilities, he finds himself lost in confusion over right and wrong, good and evil...
