D'Day 100 - D'Day 200.
The 1008 Doomsday Pillars came down to earth together 100 days after the plague came. These giant tower-shaped foreign objects descended from the sky simultaneously and suddenly, without any signs nor notice.
These foreign objects were widespread in all six continents: America, Europe, Africa, Asia, Australia, and Antarctica. At the same time, the terror of mutated beasts and zombies that haunted them all day and night was replaced as though it was simply an old chapter of a book. From there, a new future for mankind began.
The first ten days passed with fear, anxiety, and curiosity. Not only a few people thought that these strange pillars were an attack from extraterrestrials. This was especially experienced by explorers who entered the towers for the first time and had to experience the first challenge of the towers.