A low hum is heard. At first, it was nothing more than a headache. A strange noise in the distance. Easy to ignore. Until the violence began.

As neighbors turn on neighbors and madness spreads through the town like a plague, Sheriff Denny Colten, Deputy Aviaja Esmeralda, and audiologist Dr. Chester Graham find themselves trapped inside a nightmare that defies explanation.

The deeper they search for the source of the Hum, the more reality itself begins to unravel around them.