As the winter solstice approaches in Myrtlewood, the Yuletide festivities are underway, but the cheer is overshadowed by mysterious winter deaths. Athena and Rosemary must embark on a perilous journey to the Underworld. Along the way, they uncover clues about a prophecy and encounter allies and adversaries in the dream realm. As they get closer to their goal, they face unexpected challenges, and true motives are revealed. Can they unravel the mysteries of the past before it's too late? The fate of the future hangs in the balance in this magical tale of fae, gods, and ancient prophecies.