In 1943, in Los Alamos, New Mexico, a team of government scientists is working on the top secret Manhattan Project in a race to produce an atomic bomb before the Nazis. Meanwhile, their families adjust to a life on the military base.
A skeptical female clinical psychologist joins a priest-in-training and a blue-collar contractor as they investigate supposed miracles, demonic possession, and other extraordinary occurrences to see if there's a scientific explanation or if something truly supernatural is at work.
When Cecilia's abusive ex takes his own life and leaves her fortune, she suspects his death was a hoax. As a series of coincidences turn lethal, Cecilia works to prove that she is being hunted by someone nobody can see.