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.

A corrupt factory’s illegal grave-digging unleashes a deadly two-headed python, provoking a brutal snake attack on a nearby town. As security officials and factory leaders attempt to exploit the creature for profit, ordinary workers are forced to confront human greed and fight for survival when nature strikes back.

It follows a forensic doctor and a security commander investigating a ghost story linked to an old debt and a mysterious wedding.