Wynne submits her resignation at the lab, but a sudden chemical leak forces an evacuation. Doors lock and poison gas spreads; with only one mask, Nathan refuses to share and records a time-locked message. Rescue finds Wynne alive but Dr. Griffin dead. Wynne, who had accepted Nathan’s proposal the night before, screams “You bastard” as she hears Nathan’s sealed plea: look after his little brother Nolan for seven years. The key turn is Nathan’s recorded, seven-year demand—Wynne survives but now must honor that timed promise while her future remains unresolved.