As the creepy little town of Nightshade prepares to celebrate its two hundredth anniversary -- on Halloween, of course -- many of its paranormal residents are receiving mysterious blackmail letters. Psychic teen Daisy Giordano and her sisters set out to find who is behind the threats. But launching an investigation isn't easy for Daisy with her overprotective father watching her every move. Though she's happy to have him back after the years he spent being held captive by an anti-paranormal group called the Scourge, Dad is having a difficult time adjusting to home life -- and the fact that his little girl is now a senior in high school. He even disapproves of Daisy's boyfriend, Ryan. Ryan, meanwhile, to Daisy's dismay, has been considering some faraway colleges thanks to the advice of Nightshade High's new guidance counselor. Can their relationship take the strain? And Daisy's got even more on her plate: A talented amateur cook, she has won cooking lessons with celebrity chef Circe Silvertongue. After nosing around (with a little help from Circe's pet pig), Daisy begins to suspect that the temperamental chef has got more secrets than just her ingredients . . .