Hal finally reveals his internal struggle to everyone, and it doesn't bode well for the Masons. Lourdes experiments with a risky new medical procedure. And Charleston's government sees a massive shift in leadership when a group breaks away on a search and rescue mission.

Things seem much too calm for Tom, making him suspicious of his surroundings. On his way back to Charleston, he makes a number of discoveries, some incredibly surprising and others utterly horrifying. Meanwhile, Weaver and Pope butt heads over how to handle the suspected mole.