In the post-apocalyptic world, man's mysterious relics meet very different fates, including those in a site in the U.S. called the "Crypt of Civilization". Other crypts, safes, and time capsules are exposed to new threats. An abandoned Mental Hospital in Connecticut offers clues regarding man's ability to preserve records. Can the military training given to Marine Corps dogs help them succeed in the wild?

Examine the apocalyptic fate of every home in the world. Gas leaks turn suburbs into infernos; a famous castle is toppled by a hidden flaw. Paint causes some high-end homes to explode in flames. Houses fall from the world tallest apartments to the most crowded complexes.