Our heroes are on the trail of a killer, but the trail leads to distant Grand Junction, and they'll have to cross the monster-haunted wasteland that lies between the Five Cities to get there. Everyone asks Junkman about his lost childhood in the Muck, but Mugen--with a dying father and a chip on his shoulder--seems to be nursing a few secrets of his own... Are they ready to join Lady Calliope and learn about the wilds? Or will they go the way of Metal John and be erased outside the City Limits?