In Pine Oak, Texas, 10-year-old Amelia wants to turn the family’s horse stable into a haunted house, but first, she’ll have to convince her reluctant older sister Olivia.

Amelia and Olivia visit the mysterious Mr. Grimsby to borrow a fog machine but meet someone unexpected.

The haunted stable comes to life as Amelia, Olivia, Sebastian, and Mr. Grimsby transform it into a Halloween masterpiece.

As the Halloween party begins, Amelia rallies the neighborhood kids to help lure their parents into the haunted stable, with a little help from Sebastian and Mr. Grimsby.

While the parents gossip and sip Zima, the kids sneak around and prepare to launch their haunted house surprise.

The haunted stable prank unfolds, terrifying the parents—but behind the screams lies a heartfelt message that brings the whole family closer together.

As the girls clean up the stable the morning after, a quiet chill settles in—one that feels colder than it should.