In the present, Juliette Nichols survives her forced "cleaning" but returns with memory loss as the silo recovers from rebellion and faces a dangerous new threat. Meanwhile, in the "Before Times," journalist Helen Drew and Congressman Daniel Keene uncover a conspiracy that pulls them into a chain of events with catastrophic, irreversible consequences.

In season four, Ted returns to Richmond, taking on his biggest challenge yet: coaching a second division women's football team. Throughout the course of the season, Ted and the team learn to leap before they look, taking chances they never thought they would.

In season two, now promoted to lieutenant, María finds herself torn between the rules she's sworn to uphold and a relentless pull toward the truth when the body of a student activist is discovered, and the Azules are pulled into an investigation that reaches back to the student massacre of 1968. Before they can make sense of what they've found, the body of a person connected to that brutal chapter of history is found, sending shock waves through the department. Someone is delivering justice straight to the police’s door, and the Azules are the department's last hope of stopping the killer. As María, Valentina, Gabina and Ángeles fight battles both inside and outside the precinct, buried truths rise to the surface and they’re forced to confront an uncomfortable question: in a system plagued with corruption, what is the cost of fighting for their ideals?

In season two, the Dessens settle into a quiet life in a world that finally seems safe, until the unimaginable forces them to run once again. As Jason's obsession with the Box deepens, Daniela's growing paranoia pushes her to the brink, threatening to tear their fragile stability apart. Elsewhere, Amanda and Ryan join forces in a desperate attempt to find their way home. With Blair determined to stop him, Leighton relentlessly chases his grand vision of creating a perfect world.