When a massive, gilled monster emerges from the deep and tears through the city, the government scrambles to save its citizens. A rag-tag team of volunteers cuts through a web of red tape to uncover the monster's weakness and its mysterious ties to a foreign superpower. But time is not on their side - the greatest catastrophe to ever befall the world is about to evolve right before their very eyes.

Minnesota, 1990. Detective Bruce Kenner investigates the case of young Angela, who accuses her father, John Gray, of an unspeakable crime. When John unexpectedly and without recollection admits guilt, renowned psychologist Dr. Raines is brought in to help him relive his memories and what they discover unmasks a horrifying nationwide mystery.