My name is Chen Goucheng. I was raised like a dog since I was a child. I was kept in an iron cage, ate swill, and tied around the neck with an iron chain. Until my master released me and said, "Go down the mountain and bite people." On the day I came down from the mountain, I bit the throats of three people. From then on, people in the city called me - Mad Dog. But I only bite one kind of person: the old man who refuses to repay his debts, the human trafficker who forces girls into prostitution, and the capital dog who eats people without spitting out their bones. Until one day, I bit the head of the "master" who locked me in the iron cage. He knelt on the ground and cried, "Gou Sheng, I am your biological father.
