At an overrun station, Grant—Leah's fiancé and security chief—pulls their daughter Emma onto the bus, then shoves Leah into the infected. Bitten and killed, she wakes changed: infected but still herself, able to command the dead to stop. Bear in hand, she heads for New Eden—and her daughter.
With Cole—a veteran broken by a military experiment—and others, she heads west on traces Emma left: a drawing, a star sticker.
Grant engineered the outbreak for profit; Emma is slated for a secret experiment. Leah slips into New Eden, reunites with her daughter, trading cooperation for the children's release. Her power costs her memories—first French toast, then her daughter's name. Emma: "Every time you forget, I'll tell you again. I'm Emma."
Their escape is hijacked: Grant sends them underground, where an infected guard remembering his daughter helps raise the gate—and forces Cole to fire. Leah breaks his grip—and forgets the man who carried her this far.
Leah exposes it all: footage goes live. Grant fires, unleashes the infected, and is caught. Leah holds them back as the gate falls, spending almost all her memory—until Emma sings her home.
Grant gets life without parole. Cole's controller is removed. Leah meets him again: "I'm Cole." "Leah. I have a daughter." On Emma's ninth birthday, three chairs, nine candles, a card saying MOM: "I want to go home with you."
