Time is running out for Yelen and Mirika Semova. Although the sisters have a gained a reputation for success among the explorers of the Frozen City, their lives are haunted by a curse that hangs over Yelen. The more she uses her magic, the closer the demon Azzanar comes to claiming her, body and soul. When the sisters recover a strange artifact, dark truths are revealed, old alliances are broken, and the sisters are separated. Each sister is faced with terrible choices. Who will they turn to for help, and what price will they pay to get it?