A Box Full of Darkness by Simone St. James is a supernatural thriller about the Esmie siblings, Violet, Vail, and Dodie, who return to their haunted childhood home in Fell, NY, to confront the mystery of their younger brother Ben's disappearance decades ago, driven by cryptic messages from Ben himself, uncovering dark small-town secrets and confronting malevolent spirits that have plagued them since childhood. The story blends family trauma and dysfunctional sibling dynamics with chilling paranormal events, exploring how each sibling copes with their shared past and the lingering presence of a menacing entity known as "Sister".