Refugees from a war-torn country seeking asylum wash up on the beach of a small fishing town. But the country these people are from is America – and the war they are fleeing hasn't happened yet.

In a flash forward to the year 2187, Reece finds Leah, an orphaned baby, and goes against her Apex cohorts to take her in as her own; in the present day, Jude is blindsided by a mysterious team intent on capturing Reece by any means necessary.

A wounded Reece faces off with her pursuers; Jude's plan to spend quality time with his son leads to a terrifying ordeal; Hannah escapes to get her first look at the outside world; Emma discovers unsettling information.

Flashbacks reveal a haunting connection between Marshall and the early migration; Jude investigates a mysterious disappearance; Sophie risks her life and career to help Reece save her daughter.

Jude is forced to confront his past when he travels back to Oakland to seek assistance from a former colleague; Caleb reaches out to Marshall after noticing heightened security around the camp; Sophie experiences an unexpected setback.