When Lin Mo, a senior high school student, was worried about rent, he picked up a stray cat "Xiao Hei" who could only do arithmetic. He accidentally triggered the bronze contract ring left by his parents and awakened as a contractor. This seemingly ordinary black cat is actually a descendant of the ancient "spirit-eating cat". It can evolve through devouring psychic powers. It is also closely related to the "Misty Forest Secret Realm" where its parents disappeared six years ago.
With the college entrance examination coming soon, he not only has to deal with the actual combat assessment of pet beasts, but also avoids the pursuit of the "Dark Beast Organization" who covets Xiao Hei's bloodline - Poisonous Scorpion disguised as a doctor, Professor Zhang who hides his identity, and layers of conspiracies follow him. The secret of the bronze ring, the disastrous legend of the civet-eating cat, the realm of nothingness after the crack in the void... Lin Mo took Xiao Hei from the classroom examination room to the secret abyss. In the troubled world where pet beasts and humans coexist, they uncover the truth about the disappearance of their parents, and step by step onto the top of the world.
