Since they lost their parents when they were young, Shi Xia and her brother, Shi Dong, have relied on one another. After her brother vanished inexplicably, Shi Xia has been searching for him ever since.

After being transported to an odd xianxia world one day, Shi Xia encounters the immortal Hou Chi, who takes her in as his younger sister. Shi Dong soon makes a comeback, this time as the head of a fearsome sect of demons. As the “brothers” vie for the privilege of defending Shi Xia, comedy breaks out.