The drama is adapted from the comic "My Brother is Seeking Death Again". It tells the story of Shi Xia, a smart and cute genius girl, who accidentally comes to a strange fairy world in search of her missing brother. The funny and warm daily interactions between her brother Shi Dong, the Demon Lord, who has a sister-control, and Hou Chi, the supreme ancestor of the Yuhua Sect, unfolds a hilarious story of two brothers working together to "protect" their sister.