Radio astronomers discover a mysterious signal in the deep sea that could be contact with extraterrestrials. After several terrifying manifestations threaten their beliefs, the team must fight to survive the ultimate evil.

Maddy is 16 years old. She lives alone with her sick grandmother in a rundown farmhouse off a highway in Nowheresville, Texas. She does her best to take care of her mute, wheelchair-bound grandmother, but life at home is lonely and depressing. So, like everyone else within a 20 mile radius, Maddy spends her free time at the only place with half a pulse- the local roller rink.