Sima Yuexiu is the only full-time reviewer in the beast-controlling world. His daily job is to put a red cross on the reports of Qinglan Rating Institute - he can always accurately point out the hidden advantages of those contracted beasts that are judged as "waste", but no one always believes him. Until a "city-level beast-controlling trial", the rating office rated a lame native dog as F-level, but Sima Yuexiu wrote on the report "SSS-level hidden beast, earth-devouring black dog", which attracted ridicule from the city's beast-controllers. During the trial, the earth dog broke out at a critical moment and overturned the third-level ferocious beast with its earth power, shocking everyone. Subsequently, the "sick white cat" (a nine-tailed sky fox larvae) and the "broken-horned goat" (a unicorn hybrid) contracted by Sima Yuexiu successively revealed their power as mythical beasts in crises, and the credibility of Qinglan Rating Institute began to waver. In order to maintain his authority, the director of the rating institute set up a trap to frame Sima Yuexiu for "forging animal records", but unexpectedly revealed the secret of Sima Yuexiu's "Eye of True Sight", which allows him to see the true bloodline of animals. As more hidden beasts were discovered by Sima Yuexiu, the rating system in the beast-controlling world gradually loosened, and a conspiracy against the "hidden beast holders" quietly approached Sima Yuexiu.
