Noah's unexplained absence sends Helen on a journey of increasingly troublesome discoveries. Meanwhile, Noah is compelled to return to a place he's spent his life trying to escape and attempts to repair his relationship with Martin before it's too late.

An unexpected event gives Alison reason to celebrate but it also provokes a sobering realization. Soon after, a startling warning leaves her pondering the unthinkable. Meanwhile, Cole's frustrations with Alison come to a head and reveal a radical truth.