In the solemn Forbidden City, there is a scene of bustling activity. Cao Renchao, the chief eunuch of the Eastern Depot, is deeply favored by the Emperor, holding a high position and always attending to the Emperor's side. He often pretends to have no martial arts skills, but in reality, he conceals his true abilities. However, there are twelve imperial secret agents, arranged according to the Chinese zodiac from Rat to Pig. This group was established by the previous emperor and only takes orders directly from the current emperor. Within the palace, these twelve agents usually lie in wait in various places, gathering intelligence. They have trained hard in martial arts since childhood and were sent to the mountains to fight tigers and wolves. They can transform into various shapes to disguise their identities and are responsible for ensuring the emperor's safety within the palace. Among them, Lingling Dog is the most special one, and a series of grudges and entanglements revolve around him in the palace...