This episode is set in the future. The technology which creates Dolls was stolen by the Japanese and used to change the entire world into mindless Dolls, as a form of mass super soldiers. There are a few regular people left, who prove it by tattooing their real names on their back in order for people to know if they have been mind wiped. But there is legend of a woman – Echo/Caroline – who founded a safehaven for the real people left in the world. But how do they get there…?

Dollhouse, Season 1, Episode 13, Epitaph One