Tang Ren's apprentice, the fourth detective “Amo” in the Crimaster detective rankings, nicknamed “林黑狗”, has an IQ as high as 142.

Lin Mo is extremely sensitive to smells. He originally lived in a wealthy and happy family, but he witnessed his mother being murdered and became an orphan.After that, he continued to exercise his sense of smell in order to one day catch the murderer again by smell. He also became proficient in chemistry and was good at finding clues from smell for reasoning.