When a last-minute invitation from fellow student Emma Chapman brings her to Starvewood Hall for the holidays, Ashley Smith, an American art student in London, discovers this seemingly charming English village's grim history when a local girl is brutally murdered and Emma's brother is linked to the crime.

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...