Rachel is unemployed and devastated by a recent divorce. She fills her time with drinking, riding the commuter train, and fantasizing about a seemingly perfect couple the train passes by every day. Then one morning, Rachel sees something shocking that unravels her and entangles her in an unfolding mystery.

Sarah Moss is an ambitious new recruit at an elite private intelligence firm. Her first undercover assignment is to infiltrate 'The East,' an elusive activist collective that terrorizes corporate leaders who commit crimes against humanity. The more involved she gets, the more Sarah's life is in danger.