Bill Hader is set to write, direct and star in the upcoming horror movie They Know, based on an original story Hader created with Barry collaborator Duffy Boudreau.

They Know centers on a divorced dad (Bill Hader) who grows suspicious that his ex-wife is secretly dating a mysterious man who is having a strange influence on their children.

MRC is the studio financing the feature, which goes into production this Spring.

Bob Graf and Bill Hader will produce via Hanarply, with Alyssa Donovan co-producing.

Deadline first reported on the film.