Dr. Sarah Morrison had kind eyes and a soothing voice, but Luna found herself resenting the woman's gentle probing into her fractured memories.

"Tell me about the nightmares," Dr. Morrison said during their second session.

Luna curled deeper into the leather chair in what had once been a guest room, now converted into a makeshift therapy office. "They're not nightmares. They're memories."

"How can you tell the difference?"

"Because nightmares fade when you wake up. These get ...