Three years have passed since the ground split open unleashing a strange layer of fog across the Earth. Hovering a few stories high off the ground, the two-meter thick veil separates the world in two. Above, the remnants of humanity learn to cope with their new lives.

Below...

...Dwellers. Vicious creatures varying in appearance and abilities prowl the abandoned streets for prey. Unable to pass through the mysterious cloud layer, dwellers have staked claim to the lower level attacking anything that wanders into their shadowy domain.

Ian Miller leads the scavenging crew for a survivor camp located above the clouds. When his most recent mission results in his team being attacked, he must venture further than he ever has into the new world crawling with monsters. On his trek he meets a young woman unfazed by the new dangers, intent on taking the fight to the creatures.