Pumpkin with a Secret

Lydia moves with her parents to Ghost Harbor, to the house of her late aunt. In order to get closer to her classmates, she throws a Halloween party, during which one of the carved pumpkins breaks and a... human skull falls out. The police quickly determine that this is the skull of a history teacher who went missing a year ago. But who would want to kill him? Where are the rest of his body parts? And why did the skull end up with Lydia? Many are convinced that her late aunt is somehow involved in this case, so the girl has to start her own investigation alongside the police...