A Demonic entity breaches a Medium at a young couple's housewarming party, wreaking havoc and terrifying the attendees. After the party, the entity begins stalking the guests. They attempt to fight back, but don't know who they can trust as the Demon can shape-shift and appear to be anyone. The stakes grow higher when the Demon begins killing them, one by one.

The film follows a rebellious teen named Cassie Vanderbilt, whose wild streak escalates as her caring father Lucas decides to take her and his new wife Sarah out of the city for some bonding and quality time together. But after Cassie crosses the infamous McKinley family, it becomes clear that sometimes danger lies hidden in the weeds, ready to strike at any moment.

Evelyn and her oblivious son Ziggy seek out replacements for each other. As Evelyn tries to parent an unassuming teenager at her shelter, Ziggy fumbles through his pursuit of a brilliant young woman at school.