Three college friends, Jim, Ginger, and Dixie, pool their money together to buy a supposedly haunted antique box from an online auction site. Skeptical but curious, they hope to experience something supernatural. To their surprise, the box arrives with a letter detailing its dark history and a warning against opening it. Ignoring the caution, the friends pry the box open and inadvertently unleash an aggressive and malevolent spirit named Katie Malone. Initially, they dismiss the eerie incidents that start happening around them as mere coincidences.

However, as the disturbances grow more severe and life-threatening, the trio realizes the seriousness of their mistake. Strange and violent supernatural occurrences begin to plague their everyday lives, targeting not only them but those around them. The friends embark on a desperate quest to understand the spirit's history and find a way to contain or banish her before it's too late. Consulting various experts in the paranormal and unearthing hidden secrets linked to the entity, they delve deeper into the dark legacy of the box, encountering unforeseen dangers at every turn.