Violet, her cousin Leon, and the Pixie Tricker Sprite have a serious problem: the fairy they are dealing with now is a water sprite named Aquamarina, who is not only messing up plumbing all over town, but has made a home in a fish tank at the pet store, and has turned anyone who sees her into fish--in the water she is powerful so the three fairy-hunters must come up with a way to trick her onto dry land where she can be overcome.

In the eighteenth-century Scotland Highlands, untutored cailleach Rowenna must master her craft to free her cursed brothers, thwart a charismatic tyrant, and save her village.

Long ago the dam formed, the lively river turned into a swamp, and the wasting illness came to Luna's village, and now that her little sister is sick Luna will do anything to save her, even offer herself to the creature that lives in the swamp on the day of the nearer moon--a lonely and bitter water sprite who was left behind when her people fled through a door to another world.