On July 17, 2045, an unexpected rainstorm swept the world.
It rained for seven days and seven nights. When the last drop of rain fell, the world was silent for three full minutes - and then screams rang out from all over the world.
People discovered that someone around them had disappeared. Not dead, but disappearing into thin air, as if it had never existed. The global population has dropped by half. No one knows where the disappeared people have gone, and no one knows whether they will be next.
Scientists named this disaster "The Rain of Nothing".
Purpose: Survival or destruction