The apocalypse arrives, and mutated beasts run rampant. High school student Lin Chuan unexpectedly awakens the Primordial Sign-In Space. By lying flat and signing in each day, he can collect miraculous items such as healing agents and defensive shields.
When mutated rats attack his classroom, he rescues top student Su Wanqing from beneath the rubble. His first sign-in earns him a basic healing agent, and his space can also store supplies and accelerate time. From then on, Lin Chuan uses the space to lie flat in safety amid the apocalypse. By day, he signs in, stocks up, and cultivates to level up. At night, he takes advantage of the space’s accelerated time to study tactics, easily dealing with mutated crows, bone-splitting wolves, and other beasts.
When antagonists like Zhou Hu provoke and scheme against him, he cleverly turns the tables with sign-in rewards such as smoke bombs and tactical daggers, even using the space’s layout to counterattack and kill them. Su Wanqing uses her knowledge to help him analyze the beasts’ weaknesses, and the two work together seamlessly. In an apocalypse full of danger, they quietly grow stronger while protecting their base, turning “lying flat” into the ultimate survival strategy.
