Mr. Bratt gives Margot an old scrapbook he found in the basement of the Biddle House. As she flips through the pages, she's sent on an unexpected journey to 1993 when her mom was a student at Port Lawrence High. As Margot delves deeper into the book, she learns secrets that have terrifying consequences.

Mr. Bratt tells the teens about Harold Biddle and the history of the house. In this decades-spanning story, the teens get closer to discovering the truth about what’s haunting Port Lawrence and who might be responsible for it.