It's six months after the initial infection and the U.S. army have restored order and are slowly bringing British citizens back to a quarantined London, where a heavily guarded community is picking up the pieces and trying to return to normal life. Into this precarious situation come Andy and Tammy, a brother and sister who were lucky enough to be on a foreign school trip when the virus originally broke out. Reunited with their father, Don, they learn that their mother perished in the first few find out more...