Juliette finds sanctuary in a silo long ago destroyed by war, thinking she's alone.

In Silo 18, shock and unrest take hold in the wake of Juliette doing what no one's done before.

Bernard enacts a plan to root out Knox, Shirley, and Walker. Billings takes a stand. Solo saves Juliette's life and wants something in return.

Lukas is assigned a mission. Mechanical sends a powerful message. Juliette embarks on a perilous descent—and confronts a new danger.