Chen Pingchuan has spent three years surviving in a foreign world when the Apocalyptic Wasteland Simulator suddenly falls into his hands. The tool grants him a glimpse into Federation Calendar year 1257's darkest hour—when Spring City faces annihilation from catastrophic cosmic events. A deluge of intensely radioactive crimson rain will spawn nightmarish Black Demons across the region. Armed with foreknowledge from his simulator, Chen possesses an unprecedented survival advantage. Yet his true obsession lies elsewhere: unraveling the mystery of a mysterious woman who appears within his simulations, leaving behind cryptic artifacts and haunting messages. Two lines inscribed on weathered parchment drive his quest: [Avoid the red rain!] and [Forget me!]. A small vial of unknown liquid accompanies her plea—a puzzle demanding answers. As Chen navigates between his simulations and harsh reality, he must balance his own survival against the burning need to understand who she is and why she continues reaching out from beyond his comprehension.