A devastated man named Frank attempts to connect with his deceased children from the afterlife using an EVP box, leading to a tragic turn of events as he becomes possessed by a ghost, ultimately causing him to take his own life. Following this haunting incident, a woman referred to as Dr. Morello narrates the gruesome tale of her family's murder, one member at a time, by an unidentified malevolent force.
Years later, Evan Asher, portrayed by Harrison Gilbertson, along with his family, moves into the old Morello residence, blissfully unaware of its tragic history steeped in death and sorrow. After struggling with sleepless nights, Evan ventures out for a walk and encounters Samantha, who is distressed due to her alcoholic and abusive father. A moment of connection leads to her slipping into his bed that very night, intensifying their bond. Shortly after their arrival, Evan experiences chilling paranormal occurrences and insists that Samantha, known as Sam (Liana Liberato), help him decipher the strange happenings.
As this duo grows closer, they inevitably fall in love, and while exploring the house, they stumble upon the same EVP box that once tormented Frank. Initially skeptical, they decide to use it to communicate with the spirits, soon discovering that their attempts are met with startling success. The ghosts persistently haunt the teenagers, even reaching out to the youngest sibling in Evan's family, while the oblivious parents remain completely unaware of the escalating turmoil. Under the advisement of Dr. Morello, who they suspect holds crucial knowledge about the supernatural disturbances, a frightened Evan and Sam resolve to rid themselves of the box along with the personal effects belonging to the previous owners. They even seal the cramped attic room where the box was located, hoping to end the hauntings.
Unfortunately, their efforts yield no respite. One fateful night, a haunting woman's spirit torments them and locks the door behind them, trapping the teens inside. Sam experiences a revealing psychic vision, wherein she learns that the ghost represents a vengeful spirit tied to Frank. The revelation unfolds that Frank had an illicit affair with a neighbor who was also his wife's patient, resulting in the birth of a daughter—Samantha. When Dr. Morello discovers the betrayal, she brutally murders the woman while Frank watches helplessly holding the infant born from the affair. The grave of the woman is revealed to be hidden within the attic room where Evan currently resides.
Possessed by her mother’s spirit, Sam ultimately meets a tragic fate, violently taking Evan's life with a hammer while condemning, > "You shouldn't have burned the box, you shouldn't have closed the room." In a heart-wrenching twist, Sam is caught by Evan's father while she tries to unveil the hidden wooden plank concealing the remains, continuously calling out for her “Mommy”. Her arrest by the authorities marks a grim ending to this harrowing story. The film concludes with the haunting voice of Dr. Morello contemplating the fate of the house, pondering whether Evan will forever haunt its corridors, much like she fears her own family will be destined to do.
