Princess Shunde captured a shark demon and wanted to find someone to help domesticate it. The task involves three wishes, one is for the demon to speak human words, second is for him to grow legs, and the third is for him to serve loyally. Those born with the power to harness and tame demons, called demon masters, are allowed to exist in only four parts of the world under current imperial rule. The Demon Island to the east, the Demon Mountain to the west, the Demon Terrace to the north, and the Demon Valley to the south. She is the most talented and powerful demon master in the Demon Valley, but her heart has been enchanted by the shark