Just as the lightning bolt of memory passed, a pair of hands grabbed Olivia's shoulders and shoved her body backwards against the wooden floor. I'm not going to die here, am I? she thought, though the answer seemed all too clear. Am I? Port Gamble, Washington: When the body of English exchange student Olivia Grant is found at the palatial home of local schoolgirl Brianna Connors, the town assumes that it was a Halloween prank gone wrong. But when Brianna and her boyfriend Drew are spotted casually shopping the next day, people start to talk - how could they be so unaffected by Olivia's death? Twins Hayley and Taylor Ryan have received signs from beyond the grave for as long as they can remember. As the local police piece together the mystery, the girls begin to receive messages suggesting that something darker was at play that night. The killer had a target and they're not done yet. When the prime suspects disappear, the twins know that time is running out. But to get to the killer, they will first need to confront a close family member who harbors a long-held secret and committed the ultimate act of betrayal.