The most harrowing adventure yet from the internationally bestselling author of Deltora Quest! The Help-for-Hire team departs Raven Hill for what they think is going to be a relaxing vacation at Aunt Vivien's luxurious mansion. But there's nothing relaxing or luxurious about the two nasty old caretakers who greet them with a list of backbreaking chores. Why is Elmo's aunt nowhere to be seen? The mystery leads from the highest rooftops of Mistfall Mansion to the bottom of a pitch-black old well--a site that could prove to be a terrifying trap!