As she begins her final year of middle school, Annabelle Turner's world is out of control. Her best friend has moved across country, her beloved grandmother is spiraling into dementia, and her parents want her to enroll in a STEM high school. All Annabelle wants is to attend art school and be left alone.
When an ethereal being transports Annabelle into a bleak world of colorless faces and frozen landscapes, her dreams become nightmares. There, the frozen protector of Underworld resembles a younger version of her grandmother, and Annabelle realizes she must save the woman in order to save her grandmother.
She begins a nightly battle against an evil queen and her army, but when pieces of the Underworld follow her back into reality, she must choose. Walk away from the frozen world? Or risk everything that mattersart school, her grandmother's life, and her heartto save Underworld and set her grandmother free?