Set around the founding of the PRC, the story follows CCP undercover agent Zheng Chaoyang as he battles KMT operatives. After his cover is blown at the Peiping police station, he escapes with a critical list of KMT spies. Returning to Peiping post-liberation, Chaoyang faces a new challenge—elite KMT spies led by "Phoenix," who is revealed to be his estranged brother, Zheng Chaoshan.

In a moment of crisis when his entire clan is wiped out, the little elf pig takes on the critical mission of saving his tribe. On the perilous journey to find the Altar Purifier, he overcomes multiple obstacles and gains confidence. With the help of the Altar Purifier, he defeats all evil forces by his own strength, attaining self-actualization.