Richard was a janitor at the Fort Smith Scientific Research Institute. He had the key to every floor in the building. One day he found that the research institute was blocked by the army. Potty asked Richard to take Gus away. She wanted to go back and burn her ownResearch results, she is worried that if the research results fall into the wrong hands, they will cause the destruction of the world.

Bodie and Charles parted ways, and Charles took Gus to live at the border of Yellowstone Park, while Bodie's whereabouts were unknown.

After spending ten peaceful years in the forest with Gus, crisis still came.

Richard unfortunately dies, and Gus makes friends by chance with a wandering loner named Jeppard.

What Richard traces back to what he has lost is actually very simple, which is the peaceful life before the virus struck.