In September 2028, a "Prism Event" occurred simultaneously with the Earth.
A large number of geometric transparent cracks appeared in the sky, and the sunlight was distorted after passing through the cracks. The sky above countless cities seemed to be cut into a kaleidoscope.
Physical rules fail locally near the crack: gravity direction changes, spatial distance folds, and time velocity anomalies.
A large number of "four-dimensional fragments" fell into the three-dimensional world from the cracks, forming a mutation area, which is called a "collapse domain."
Human beings cannot directly enter the center of the collapse domain, and all living creatures that approach will die due to the tearing of space.
Global civilization collapsed within three months and the population plummeted.
