In a fantasy world where humans, demons, and immortals coexist, the human world is prosperous, the demon world is divided, and the immortal world rules the order of the three realms. Tang Xiaoxian, a black-headed snake demon with a kind nature, accidentally opened up his spiritual wisdom by taking a fairy medicine and determined to become an immortal. However, he accidentally got involved in a shocking conspiracy that endangered the three realms, and thus embarked on an adventure full of laughter and passion.
