In 1987 Chicago, snarky stripper Angie Pitarelli engages in her regular rivalry with Sally Mewbourne, who leads a league of religious protesters, outside of Revealers adult bookstore. Angie then works her shift as an exotic dancer in the store's peepshow booth.An otherworldly tear in the sky unleashes the apocalypse. People on the street begin tearing each other apart. Revealers proprietor Ray gets swept up in the chaos when he tries turning away protesters who attempt to seek safety inside his store. Angie witnesses Ray dying horribly as she becomes trapped inside her booth.Sally ends up as the only survivor to make it inside Revealers. She and Angie continue stoking animosity over their different morals and religious beliefs even though they realize they will have to team up together to escape the store.Ray reanimates as a zombie that attacks Sally. Angie provides a distraction so Sally can beat Ray to death with a crowbar. Sally returns the lifesaving favor by rescuing Angie from a sentient tentacle creature.Angie becomes drawn to the voice of her nephew David pleading for help. The source of the sound turns out to be Asmodeus, whom Sally identifies as the demon prince of lust and judgment.Since Revealers used to be a speakeasy during Prohibition, Angie and Sally escape to underground bootlegger tunnels. Sally starts seeing Angie in a different light when Angie discusses how she became her nephew's guardian. The two women gradually form a bond as they come to understand each other better.When Sally insists on taking a tunnel toward Saint Augustine's Church even though Angie wants to follow a path toward David, the two women decide to go separate ways. However, they come back together after Angie returns to rescue Sally from a swarm of slithering snake creatures.Sally's religious beliefs are shaken when she realizes the snakes were coming for her instead of Angie even though she tried to lead a pious life. Angie discovers Sally secretly envies her and is also a closeted lesbian. Angie explains that the demons don't want Angie because she is gay, but because she won't stop lying to herself.Asmodeus attacks the two women. Following a series of unusual events, Angie and Sally take down the demon together.Angie and Sally finally find themselves at underground doors that supposedly connect to the church. Sally worries that the world outside ended and senses something strange about their circumstances. Undaunted, Angie takes Sally's hand and they go through the doors together. The lights flicker, demonic laughter is heard, and the fourth and final trumpet foretold in the Book of Revelations sounds. The camera pulls back to show the world above overtaken by the end times. (thanks to culturecrypt)