After multiple dirty bombs are detonated|spreading deadly toxic ash across Los Angeles|Brad (Rory Cochrane) inadvertently quarantines his wife|Lexi (Mary McCormack)|outside their home by safely sealing himself inside. With the city under siege and Martial Law in affect|Brad and Lexi struggle to survive with few supplies|less time and no information- all the while separated by thin doors and thinner sheets of plastic. When help finally arrives|it's anything but.