The world is different compared to how we used to know it. Parts of the world shifted due to the meteor crash, some collapsed while others formed new areas where humans can live. A new form of energy came to be after the calamity which humanity called as spiritual energy, the lifespan of earths inhabitants doubled and the base strength of a person became able to carry a ten ton weight.
Life for humanity became harder, aside from trying hard to find the necessary necessities to live, another life form came to be called the Spiritas. The spiritas became the humans competitor for resources, skirmishes frequently occur in bid to claim teritory.
The spiritas comes in all forms and sizes, ranging from as big as a pingpong ball to all large as a small ferry. Spiritas have better aptitude in utilizing spiritual energy which made them more formidable in earths new environment, humanity was only able to go toe-to-toe with the use of technological weapons.