Mother Abagail selects a surprising voice to be her conduit to her chosen Committee in Boulder: the young deaf man Nick Andros. The arrival of a disturbing visitor to the Boulder Free Zone, shakes the Committee and Boulder residents to their core. Elsewhere in the Free Zone, Nadine Cross is haunted by a childhood memory.

The Boulder Free Zone Committee looks to solidify their leadership and bolster the community with a town hall meeting, but Flagg continues to make inroads as he plots to destroy the newly-forming society from within.

After tragedy strikes the Boulder Free Zone, Mother Abagail tasks members of her Committee with a dangerous mission. Meanwhile, Harold and Nadine begin their journey to New Vegas to unite with Flagg and claim their reward.

After seeing both the light and the dark, Frannie makes her stand.