Netflix is diving back into terror with screenwriter Ian McDonald, whose Black List hit Woman of the Hour sparked an $11 million bidding war. Now, McDonald has sold another thriller to the streamer—this time, a chilling dive into the sinister world of cults.

Details are scarce, but Deadline reports that Academy Award nominees Andrea Berloff (Straight Outta Compton) and John Gatins (Flight) are producing under their Netflix deal, promising a high-caliber, tense, and gripping ride into darkness.

McDonald’s Woman of the Hour turned true crime into a nerve-shredding thriller, fictionalizing serial killer Rodney Alcala’s horrific exploits and his creepy appearance on The Dating Game during his murder spree. If this new project follows suit, audiences can expect psychological terror, eerie rituals, and the kind of slow-burning dread that sticks long after the credits roll.

With Netflix backing and Oscar-nominated producers on board, this untitled cult thriller is shaping up to be one of the most unnerving releases to watch for. Stay alert… the nightmare is coming.