At the Narumi Detective Agency, Akiko has fallen ill with a cold and calls Shotaro an "idiot who never catches a cold", spurning Philip's interest in this phrase despite not knowing that it is an idiom. The agency then gets a phone call from a man named Mikio Aoki who claims that he is being chased and needs help. When Shotaro arrives on the scene, he comes across the man before seeing a black SUV run through him, causing the man to writhe in pain before falling down dead. When Shotaro is taken in for questioning at the police station the next day, Makura thinking that he murdered Aoki, Jinno arrives to reveal that Aoki died from a mysterious disease. Deciding to get to the bottom of it, Shotaro learns from Watcherman that Aoki was a member in a chop shop street gang. They head to the gang