When eighteen-year-old Ari Johnson is moved from her bedroom to the cold kingdom of Mount Kaf, where terrible and unstable genies live, she learns the truth that turns her whole world around. And suddenly her anxiety about college and problems with friendship with Charlie seem small compared to the war in which she found herself. It is not easier because of the ardent guardian Jay, who pursues her everywhere, and in whose fidelity Ari does not want to doubt, but must. She doesn't know who to trust .. The truth burns through her life, trying to turn into ashes. Ari will have to deal with ancient dangerous creatures, family problems and heartbreaking romantic relationships.