Prince Eadric, having been turned from a frog into a human again, is still in Greater Greensward where, because the Fairy Queen has disappeared, dangerous foes are threatening, so Emma must use her knowledge and magic to restore order.

"After the Duchess of the Lake catches Violet with Ash, the hired companion at the Palace of the Lake, Violet has no choice but to escape the Jewel or face certain death, so along with Ash and her best friend, Raven, Violet runs away from her unbearable life of servitude"-- Provided by publisher.

Every night Lampie, the lighthouse keeper's daughter lights the lantern which warns the ships away from the rocks, but when the light goes out one night, a ship is wrecked and Lampie is sent to the Admiral's Black House in disgrace--there she finds and befriends the Admiral's son, who was born with a tail, and together they are pulled into an adventure of mermen and pirates, and secret identities long concealed but soon to be revealed.