When the past catches up with Miles and Monroe in the form of mutual heartthrob, Emma all hell breaks loose for them physically and emotionally. Charlie and Nora are the ones who rescue Miles this time. Meanwhile Aaron's life is turned inside out while accompanying Rachel on her tenacious trek to the mysterious Tower where she plans to restore the power.

Romantic connections heat up between two couples -- Miles and Nora and Charlie and Jason -- but disastrous drone strikes from the Militia threaten them all. An assassination attempt on Monroe heightens his paranoia and Georgia Federation President Foster contemplates surrender. Meanwhile, Rachel and Aaron push through the Plains Nation into Colorado.