Summary: A man who has forgotten his name arrived in a city where he had no choice but to become a thief if he wanted to live. Every time he was caught stealing, the police would chase him, calling "Rat!" over and over again. Due to his lack of a regular name, he adopted the name Rat.
Rat went to live in the Tunnels, which is an enormous and elaborate maze of tunnels that run underneath the futuristic city of Maw. The unfortunate thing; that's where all of the gangs reside. Rat has no interest in joining a gang, so they don't exactly like him down there, but then again, they don't exactly like on the Surface either.