Welcome to the ghostpocalypse.

Stuart Angelino is a former gang enforcer on his way through empty western Kansas, fresh out of prison and ready to get his life back on track. He stops at an isolated convenience store for gas and a break. While he's there, a strange, expanding storm blows in with purple-black clouds and green lightning. He and several others are trapped inside by this storm that doesn't slacken.

A nightgown-clad woman wanders into the parking lot. One of the men in the store goes out into the rain to help her, and she viciously murders him before running off into the storm. Soon others appear, vengeful ghosts from many different times and places. Something has opened a rift between the spirit world and ours, and ghosts are returning in waves.

When it's clear no one outside the storm has entered it, the group realizes they are the world's best bet to stop what one of them calls the ghostpocalypse. But they will have to battle the weather, mobs of crazed spirits, as well as ghosts with specific grudges against those in the store. And more dangers await, because the rift is letting more than just ghosts into our reality.