They thought they were making changes to the house. But the house was making changes to them.

When their construction team discovers a hidden shaft while renovating a clients' home, mother-daughter design duo Evelyn and Erika Ellsworth need an idea, quick.

But to Erika's dismay, her flighty mom doesn't just turn the shaft into her pet project: she refuses to let anyone else in on what she's doing.

This isn't the first time her mom's gotten obsessive over a reno. And clients always love what she comes up with. So Erika decides to humor her.

That decision will prove fatal.

BONA OSSUARIA is a slow-burning morsel of surreal, psychological horror.