Jeremiah rescues a young girl who has been gang raped. The encounter elicits a murderous rage from Jeremiah because the attacker's jacket matches the one worn by his brother's killer years before. For Kurdy, a minor wound uncorks long-buried memories of childhood terror.

They bring the victim, Lydia, back to Thunder Mountain. Erin tries to heal her body and mind but Lee rages at the breach of security from bringing this woman inside. Markus confesses his concerns to Meaghan, the lone person inside Thunder Mountain he can trust absolutely.

As Jeremiah and Kurdy head off to learn more about the vaccine they have been tracking, Kurdy announces his intention to make a side trip to Portland, the town he grew up in. Kurdy hopes to solve the mystery of his suddenly persistent flashbacks from his childhood. Irritated, Jeremiah drops him off in his old neighborhood and departs to complete the mission.

In his old apartment, Kurdy remembers an argument between his parents and the sound of a gunshot. He is lost in reverie when Ricki Hatton enters the room. Both are startled to realize that she used to be Kurdy's babysitter. Reluctantly, Ricki tells him that she knows his father shot his mother, then himself while young Kurdy hid in a closet. Only then does the rest of Kurdy's memory return, a memory of his mother begging for death to end her suffering from the Big Death virus. For Kurdy, one part of his inner suffering now ends.

Jeremiah finds the man whose vaccine killed Holcomb and confronts him with the fact that his work may have another unplanned result: widespread panic.