As tensions heat up among the team at Mutant HQ, no one knows who they can trust. Fearing for his family's safety, Reed rethinks their future at the compound. Meanwhile, Dr. Campbell proposes an improved program to Jace that could change everything.

Reeva Payge purges the Inner Circle of those who disagree with her, leaving her completely in charge. Then, fast-forward six months, when the Mutant Underground saves a girl, but not her family, from a Sentinel raid. Against the group's wishes, Eclipse and Caitlin meet with a criminal hacker to get info on the Inner Circle. Meanwhile, Polaris prepares for the birth of her baby, her contractions magnetizing anything metal and wreaking havoc. She also makes Andy promise to save the baby, no matter what.