Claire doesn't believe in ghosts, even though her dad is a ghost hunter on TV. But then her dad disappears, and a strange boy in her class, Lucas, knows something about ghosts. One of them has a message for her: Her dad has been taken, and he's in grave danger. Claire and Lucas are determined to rescue her father. But how can they save him from the ghost of Hush when everyone knows that seeing the ghost means that you're destined to die...