She doesn't believe in ghosts. She doesn't believe in witches or curses or spells. The doctor doesn't believe in anything that science can't explain, but Diana Valleverde is about to learn that knowledge is an evolving proposition. Her research into brain function is uncovering secrets within the mind, but none like the one kept hidden from her since before she was born. When her brother, a curator at the university museum, gives her a family keepsake from their recently deceased grandmother, Diana begins a journey that will take her from Pennsylvania to Milan and the Italian Alps, to discover what lies hidden inside and what has caused her recent affliction by what she knows must be sleep paralysis attacks, a frightening condition in which she awakens, unable to move or cry out, with the overwhelming sense something unseen is suffocating her. There must be a medical explanation for these attacks. There must be . . . Right?