Fairy doctor Lydia has been hired by Edgar, a smooth-talking earl with a tattered past. Her ability to see and talk to fairies proves invaluable when his London estate is visited by a tiny fairy of the field. The fairy has come to fetch the Blue Knight Earl-Edgar-to marry the Fairy Queen. Unfortunately, the moon-embedded ring to complete the proposal has been stolen! Not only that, but Lydia has to deal with the reappearance of a wild kelpie from her hometown-one who also has his sights set on marriage...