A desperate angel. A captured girl. A reckless mission. In modern-day Ireland, all is as it should be. But not above the clouds we overlook every day. Above the clouds, in a hidden city called Cheiltdrome, there are some confusing predicaments with an angel turned evil that wants Earth, and all the cities above it, able to collapse at her whim. Thirteen-year-old Maeline Kearney finds out only a hint of what she is needed for, and she is taken into Cheiltdrome, expected to navigate her way through mystery, power, and all the secrets kept from her.