In 2045 AD, World War III spiraled out of control at a speed that no one expected. In the "Final War" that lasted only three weeks, nearly a thousand nuclear bombs were detonated, and the earth's ecosystem was on the verge of collapse. This catastrophe was called "the final twilight" by later generations.
However, destruction also brings new life. The global nuclear explosion accidentally tore apart some kind of space-time barrier, and a strange energy named "psionic energy" began to permeate the world along with nuclear radiation and radioactive dust. It brought new laws to the dead world: destruction is creation, death breeds new life. The combined effect of nuclear radiation and spiritual energy gave birth to the crazy evolution of life on earth and formed a brand new ecosystem.
