It's been a hundred years since a human appeared in the PMD world. Most dungeons have crumbled or simply disappeared, technology has advanced, and a city system has developed. When Terrin drops into this world as a Charmander, it's not too unfamiliar... but all is not well. Cities are encircled by protective walls. Exploration teams leave on missions and never return. Soulless shells of Pokemon haunt the wastelands between cities, with only one thought: to kill. Those who escape alive from these encounters frequently perish soon after from a mysterious illness. Even the strongest legendaries don't know what to do. Armed with a mysterious medallion, joined by an experienced Eevee, a grim Rockruff and a cowardly Riolu, a hero rises to save the world. Even if he has mixed feelings about it.