Brad strikes a deal with Sykes and Richards to stay with Amy at Project NOAH, as they begin to test the virus on her. Upon learning the harsh truth regarding the state of inmates in 4B, Brad forms an alliance to get more information. Meanwhile, Babcock sheds light on her past.

As Amy experiences symptoms of the virus that indicate she is close to turning, Brad brings everyone together, and Lila and Sykes race to perfect an anti-viral medicine to save her from Fanning. Meanwhile, Richards tries to keep Project NOAH contained when Guilder makes a mysterious decision to let go of most of the staff while also trying to ward off Babcock's attempts to get in his head.