The Barkuu, Dawn of a Species

In 2045, there are over 9 billion people on the planet. A mysterious cloud appears in space and then envelopes the planet for a day. To avoid cataclysm, humanity digs in. When they emerge, they find the air scrubbed clean and massive metallic objects all over the world.
200 years later and humankind's population is less than 1 billion, spread throughout the world. Find out how Humanity will fare, when we are no longer the dominant species.