Upon awakening to their own nature and understanding of themselves and the world, individuals can cultivate their bodies to gain the ability of a "Self Noumenon."

In the first chapter, the character Yi Nu San (Easily Angered) is introduced. He has a short temper and a fiery personality. His role involves regularly investigating the lives of superhumans and monsters who have cultivated "Self Noumenons," maintaining balance among different beings, and stopping law-breaking superhumans and monsters. On his first day, Yi Nu Sheng meets his new assistant, Ban Shou San (Half-Beast). Together, they also visit Mr. Ku San (Sadness) to check on his current situation, but unexpected problems arise that need to be resolved.

How will they handle the challenges?