When Mark discovers his old childhood phone in the attic, a wave of nostalgia turns to terror as he unlocks a series of disturbing images. A young girl trapped in a dark, empty room is just the beginning, as the photos evolve, revealing a sinister presence that seems to know Mark, and whose terror bleeds into his reality. As the line between the digital and real world blurs, Mark finds himself trapped in a nightmare, and the only way out might be through the very darkness that consumes him.