The six remaining refugees from Vault B-35 risk everything as they leave the controlled environment of the air lock and venture out into the real apocalypse, gas masks the only thing standing between them and the toxic air. Determined to find his parents and the rest of the thousands of people cryogenically frozen in the vault, Matt Voorhees leads Catherine, Justin, Stacy, Cody, and Darin across dangerous terrain, where comets...