If somebody told Sadie Hoover she would be spending the next two months in the family cabin with only her cat as company, while her parents are cruising through their vacation in France- she wouldn't deny the truth in it. If somebody had told her she'd be meeting all sorts of mythical creatures during her stay- solely because her four-legged companion brought back a mysterious artifact after disappearing for days on end- she would laugh in their face, flip them off and threaten to call an institution. So how did she end up as nr. 1 on the blacklist of an ancient, vindictive shade? And how does a rebellious mermaid play into it all?