Radiance and the Lingering

On a brilliant fall afternoon, a powerful blast of energy erupted from the cosmos, burned across the solar system, and laid waste to every living thing on Earth. Notice was short and defense impossible. From the lowliest to the loftiest, none survived. This phenomenon, they called the Radiance.

Thereafter the hapless victims of that unavoidable catastrophe wander the planet in a discorporate, ethereal state of existence. This, they call The Lingering.