Annabelle bolted upright at the sound of Cathy’s scream.

It tore through the room like a siren, high-pitched and raw.

Her heart pounded as she turned toward her sister, who was thrashing against the sheets, her small body trembling violently.

“Cathy!” Annabelle reached for her, her voice laced with panic. “Cathy, it’s me! It’s Annabelle. I am here, Cathy. You’re safe!”

But Cathy didn’t seem to hear her.

The girl’s wild eyes darted around the room, her breathing erratic, as if she were searching for an escape route.

“Cathy, look at me!” Annabelle’s hands gently gripped her sister’s arms, but Cathy recoiled, curling into herself and letting out another broken...