Zhou Youtian, an elderly carpenter, spends 300 coins to buy an ancient jade that can transform into a white lion spirit beast. To repay the old man for saving its life years ago, the white jade lion stays by his side. Duan Kui, a hunter determined to capture spirit beasts for profit, lays traps throughout the area. Together with Shi Xing, Zhou Youtian bravely confronts him and protects the creatures of the mountains. In the end, they bring the evildoer to justice, and the man and his spirit beast remain together.