Lin Xiaoyu, an ordinary boy who was "poisoned" by the myths and stories of his hometown, accidentally rescued a lost unicorn cub, Youyou, but he did not want to be involved in an adventure surrounding a mythical beast's secret treasure and a centuries-old feud. He formed a temporary team with the eccentric female Taoist priest Gao Xiaohe and the always-interrupted Uncle Wuchang, deceiving and abducting and making jokes all the way. They met more mythical beast partners, and also had many battles of wits and courage with the greedy mythical beast Taotie, and gained deep friendship, confidence and growth in the turmoil. The boundaries between reality and myth gradually blur, and difficult questions about redemption and letting go arise one after another. When the group faces the test of life and death, everyone must face their own hearts. In the end, Lin Xiaoyu and his partners worked together to solve the ancient mystery, save the disintegrating world of mythical beasts, and gain peace for the human world. They discovered that whether they are mythical beasts or mortals, growth and redemption, joy and tears are the only paths in life.
