After the tragic death of their father, Emily and Navin move with their mother to the home of her deceased great-grandfather, but the old house proves to be quite dangerous.

Emily and her friends think they'll find the help they need in Cielis, but something isn't right. Streets that were once busy are deserted, and the townspeople who are left live in fear. Emily is soon escorted to the Academy where she's expected to compete for a spot on the Guardian Council, a group of the most powerful Stonekeepers. But as the number of competitors gets smaller and smaller, a terrible secret is slowly uncovered- a secret that, if...

"Emily, Navin, and their friends continue to battle the Elf King in hopes of destroying him forever, but one of his most loyal followers, Max, isn't making it easy for them. The crew journeys to Lucien, a city that's been ravaged by the war. Emily has more enemies there than she realizes -- and it'll take everything she's got to get herself and her friends out of the city alive."--Provided by publisher.

Emily and Navin's mother is still in a coma from the arachnopod's poison, and there's only one place to find help: Kanalis, the bustling, beautiful city of waterfalls. But when Em, her brother, and Miskit and the rest of the robotic crew aboard the walking house reach the city, they quickly realize that seeking help is looking for trouble, dangerous trouble. The Elf King's son, Trellis, is still after them, but this time he's accompanied by a mysterious...