Sink your teeth into Olivia and Ivy's fifteenth fright-time adventure!Franklin Grove has always been full of secrets, but suddenly everyone seems to go into secrecy overdrive! Ivy is sure that the new girl in town, Maya, is hiding something involving Ivy's new boyfriend, Brendan . . . But what could it be?Olivia wants to help her sister get to the bottom of it, but first she has to figure out what's wrong with their stepmom, who has started behaving like a zombie! Which is weird fora vampire, right?