Something very strange starts happening in Nightshade the summer that the eldest Giordano sister, Rose, gets a job working at Dr. Franken's research laboratory. People are starting to see double. Doppelgängers of Nightshade residents are popping up all over town. Daisy, Rose and Poppy think it's a coincidence, until the rumors start that their father, who disappeared several years ago, has been spotted in town. Meanwhile, Daisy's beau, Ryan is spending all of his time training for football, and like the other guys on the team, he's grown enormous almost overnight. Samantha Devereux's boyfriend's neck has doubled in size since school ended. Could the football players be resorting to extreme measures to win? Between summer jobs, sugar rushes, and beach parties, the Giordano girls get to the bottom of these mysteries and more.