Universal Pictures is teaming up with Blumhouse Production on the fantasy-horror Mercy, which is based on Stephen King's short story entitled Gramma. Peter Cornwell will be directing the project with Frances O'Connor set to star.

The story was published in Stephen King's Skeleton Crew collection back in 1985 and centers on two boys, who visit their grandmother in a hospital and learn that their she is a witch that made a pact with a dark force.

Matt Greenberg is providing the screenplay with Jason Blum, /person/mcg/McG and Mary Viola producing.

No production schedule released for this project.