Phoebe Gray's world is upended when she finds an irritable goblin named Gnish-Gnash. She's stumbled into Lerch Hollow, a place of magic and mystery where trolls lurk in shadows and mermaids sway with the tide. The young adventurer soon finds herself caught up in a race against time; the Dark Mistress Lucinda is on the hunt for the last Griffin's egg, for its power will make her unstoppable. It is up to Phoebe to protect the egg while discovering the secrets of her own magical connection to the mysterious wizard Thatcher. With Gnish at her side and her grandfather's old cloak on her back, Phoebe must protect this enchanted world from destruction.