Sh'lainn predicts that everyone in the Bunker will die in less than twelve hours, but Rinaker ignores the Banshee's fears and proceeds to bring in an alien probe that had been recovered earlier. After touching the alien probe, Sh'lainn is infected by the Iron Death, her Banshee body poisoned from being surrounded by technology.

Reduced to the most primal instincts, Sh'lainn tries to destroy the technology that is slowly killing her. But as she tries to detonate the nuclear core that powers the Bunker, Nick rushes to Ireland to find a cure. With a potential explosion radius that would wipe out half of New Mexico, time is running out for the Alliance.