Having penned the show's final, post-apocalyptic episode, show writers Maurissa Tancharoen and Jed Whedon continue the tale of three survivors in a world overcome by a devastating technological virus. The wealthy and powerful could buy any kind of companionship at the Dollhouses, where the Rossum Corporation paid young people to have their minds wiped clean and be imprinted with computer-enhanced personalities and skills-all according to a buyer's request. Now the technology has gone viral, wiping the minds of everyone it reached, turning them into mindless butchers. Those who've avoided the call must try to survive their friends and families if they hope to destroy Rossum and save the world.