Jeremiah, a mysterious nomad searching for his missing father Devon and the fabled Valhalla Sector, has a brief yet mysterious encounter with Ezekiel, "The thunder will change you forever - but everyone you love will fall at the end of the world..." The suddenly vanishes before he can ask him any questions. He soon befriends Kurdy as he enters the outskirts of Clarefield, a small town governed by Theo who is searching for clues to the "the end of the world" a place of endless electricity and weaponry. However Theo soon suspects Jeremiah of hiding something and ...
Two brothers arrive in a town at the same time as Jeremiah and Kurdy. This episode centers around one of the brothers that claims to be a doctor trained by his father, and a sick pregnant woman who relies on him for the sake of her unborn child.
Jeremiah and Kurdy chase after some kidnapping suspects and end up capturing one, bringing him back to Thunder Mountain. He's suited up and surprisingly old, with a history at the facility. We also see some of the history of Markus.
Jeremiah and Kurdy set out to continue announcing their help to various groups and people when they come across a group of people on a pilgrimage. Their differing views on faith creates some tension between them in regards to the group and their continuing mission.
Markus needs Jeremiah to make contact with the leader of an unnamed, well-organized group, who runs her operation much like an underground railroad for supplies and materials. Unknown to Jeremiah, this woman is someone with whom he has a history.
Markus wants to start making alliances with those who are able to oppose the encroaching forces coming out of Valhalla Sector. The valuable nuclear arsenal still held in the nearby town of Camden makes it a potential target.
Jeremiah and Erin set out to help Erin's twin sister, Lauren, who has gotten herself mixed up with an abusive boyfriend, while Kurdy and Elizabeth challenge the ethical standards set forth by the leaders of a Black separatist group.
Markus' position as leader of Thunder Mountain is challenged by two suspicious brothers who feel threatened by the decision to introduce community leaders from the outside to the protected inner world of the mountain.