The daughter of Joseph Hendrickson (from the first film), who leads the investigation.

One of the survivors the rescue team encounters. The Evolving Threat

The story begins decades after the original conflict where man-made weapons known as "Screamers"—self-replicating, autonomous robotic saws—wiped out most of the planet's population. After receiving a mysterious SOS signal, the Alliance Command dispatches the spacecraft Medusa to investigate and rescue any remaining survivors. Key Characters

The mission is complicated by an impending "Class 10 Magellanic Storm" that will obliterate all life on the planet within days. The Final Conflict