Twelve-year-old Teresa has always possessed a mysterious gift that lets her sense things others cannot. When terrifying nightmares warn that her little sister Lucy is calling for help from a place of darkness, Teresa fears something terrible is about to happen. Weeks later, Lucy vanishes without a trace while playing with her friends in the village cemetery. As the village's desperate search ends in heartbreak, Teresa refuses to believe her sister simply disappeared.

Driven by her gift and with help from a ghost of a young girl named Emily, Teresa uncovers a hidden passage beneath the chapel leading to the eerie Rossfadden Lodge. There she begins to unravel the terrifying secrets of the powerful Berrington family-secrets buried for generations beneath curses, tragedy, and revenge. As the danger grows and time runs out, Teresa must summon every ounce of courage to uncover the truth and bring Lucy home.