We learned just about one year ago that Shaun of the Dead duo Simon Pegg and Nick Frost are launching their new production banner Stolen Picture with Slaughterhouse Rulez, a horror-comedy that Pegg and Frost will be starring in. Speaking with Digital Trends this week, Pegg reveals that it centers on a subterranean monster!

Previously, we had only heard that an “unspeakable horror” would be unleashed in it.

“It’s going to be really fun. It’s a sort of a horror comedy,” Pegg told the outlet. “It felt like the right thing for Nick and I to have as our first collaboration with Stolen Picture. It’s about a private school in the U.K. which sells off parts of its land to a fracking company, and the fracking company then unleashes a subterranean monster that terrorizes the school. It’s a big metaphor for the U.K. privatizing things, and it’s mixed up with some ridiculous, sloppy horror. So it’s right up our street.”

Directed by Crispian Mills, from a script he co-wrote with Henry Fitzherbert:

“The film is set in an illustrious British boarding school that becomes a bloody battleground when a mysterious sinkhole appears at a nearby fracking site unleashing unspeakable horror. Soon a new pecking order will be established as pupils, teachers and the school matron become locked in a bloody battle for survival.”

The cast also includes Finn Cole, Asa Butterfield, Hermione Corfield and Michael Sheen.

Last we heard, Slaughterhouse Rulez will release in the UK on September 7, 2018.