In an old mansion that has seen better days, young Sally feels her world crumbling after her parents' separation. Her father, with whom she moves, and his new girlfriend are more preoccupied with their own relationship than with paying attention to the girl's distress. However, her loneliness becomes something much more terrifying when she discovers a mysterious basement on the property. Intrigued, Sally ventures to explore the dark space, but what she finds are malevolent creatures that have been trapped there for years.
As the days go by, Sally begins to experience strange manifestations and whispers that lead her to investigate the dark secret of the house more deeply. The situation complicates when the creatures, eager to regain their former power, try to lure Sally into their world, promising her what she desires most: to be loved and protected. However, the adults around her do not believe her story, considering it a figment of her imagination. When the threat becomes increasingly palpable and dangerous, Sally must fight for her life and discover how to break the bond that ties these entities to the house.
Struggling against the skepticism of those around her and her own loneliness, Sally becomes a hero on a terrifying scale, confronting not only her fears but also a dark legacy from the past that no one has been willing to face.