Cory fled the foothills to deal with the pain of losing Adrian, and Green watched her go. Separately, they could easily grieve themselves to death, but when an old enemy of Green's brings them back together, they can no longer hide from their grief—or their love for each other.
But Cory's grieving has cut her off from the emotional stability that's the source of her power, and Green's worry for her has left them both weak. Cory's strength comes from love, and she finds that when she's in the presence of Adrian's best friend, Bracken, she feels stronger still.
But defeating their enemy is by no means a sure thing. As the attacks against Cory and her lovers keep coming, it becomes clear that their love might not be enough if they can't heal each other—and themselves—from the wounds that almost killed them all.