A global climate catastrophe without warning pushed human civilization into the abyss within 24 hours. Temperatures plummeted by twenty degrees, deadly acid rain and hail tore the skies, and devastating hurricanes swept across the continent. The official vague "climate anomaly" notice became the last weak echo before the collapse of civilization.
Meteorologist Su Yuan experienced hell at the Nanjiang Weather Station, the center of the disaster. Amidst the ruins and violent natural disasters, he received a chilling encrypted message from an unknown source: "Beware the rainbows, they are not light." This warning, accompanied by the crazy mutation of an unknown sample in the deep laboratory of the weather station, became the only clue he carried when he escaped into the core fortress of the weather station buried deep underground.
In the underground fortress without sunlight and scarce resources, Su Yuan and the few survivors survived for three months, relying on cans and cold instrument readings. Hope fades as time passes, as internal conflicts and the unknown horrors of the deeper regions ensue. When the government channel's radio signal is finally replaced by an eternal rustle, the world seems to die completely.
However, when Su Yuan plucked up the courage to raise the fort's observation baffle for the first time in three months, what he saw was not the dawn he expected. The raging acid rain stopped, and the sky turned an eerie, lifeless gray. What was once a city was reduced to a solidified ruin of death covered with a slippery blanket of bacteria. And at the end of this dead world, an unimaginably huge rainbow was slowly crossing the sky.
