The Co-Host

A psychological thriller of obsession, gaslighting, and the roommate who wants your life.

Check your locks. Then check your search history.

She was the perfect roommate. Until she started living your life better than you.

True crime podcaster Cassidy Burke is drowning. Her bank account is empty, her landlord is threatening eviction, and the case she’s investigating—the decades-old Milwaukee "Phantom" murders—is going nowhere.

Then comes Evelyn Hart.

Evelyn is a digital archivist. She’s quiet. She’s stable. She pays two months' rent in cash and even helps Cassidy find a flaw in her investigation that changes everything. For the first time in months, Cassidy can breathe.

First, the apartment starts smelling like bleach and clinical perfume. Then, Cassidy’s clothes are moved, her mail is sorted, and her morning routine is curated before she even wakes up. Soon, the line between Cassidy’s podcast and her reality begins to blur.

Because Evelyn isn't just a fan of the show. She knows things about the Phantom Killer that aren't in any police report. And as Cassidy gets closer to the truth, she realizes the most dangerous person in the room isn't the ghost from the 90s—it’s the woman standing in her kitchen with a perfectly placed mug.

Perfect for fans of The Housemaid and None of This Is True, THE CO-HOST is a claustrophobic nightmare that asks: can you ever truly know the person you let into your home?

Some roommates share the rent. This one wants your life.