Gus and company head north to learn the truth of Gus's (and hopefully the plague's) origins. Along the way, they encounter a strange man holing up within the walls of a dam-turned-fortress-of-self-sufficiency. He offers them sanctuary and a home, but Jeppard doesn't like it. Who to believe? They're all so tired of being afraid and running, but if they stay they may never solve the mystery.
Ooh, I don't trust him, either! Get out of there, people!