An enchanted world on the brink of war. The Academy of Indestructible Arts trains warriors. A girl from the human world happens to be in it. The second part of an exciting series about the incredible adventures of Kelsey Murphy. It's hard to have a father who is a notorious traitor. It is even more difficult to have a mother who is an omen of doom. After a summer absence, Kelsey Murphy is glad to return to the Academy of Indestructible Arts. But as soon as she and her friends settled in, they were visited by her mother, the goddess of war Nemain, with a warning of an impending disaster. The heart of Danu, the legendary source of light and warmth in the Lands of Summer, will be stolen. And only Kelsey and her friends can stop it. While they travel to the Summer City with the rest of the students to take part in the glorious Ascension Ceremony, Kelsey has no time for a military parade, a lavish ball, or even a visit to her father: she is determined to protect her Heart and her new home.