Parts per Billion

Parts Per Billion is a 2014 romantic drama written and directed by Brian Horiuchi. It stars an ensemble cast comprising Josh Hartnett, Rosario Dawson, Teresa Palmer, Penn Badgley, Gena Rowlands, and Frank Langella as three loosely connected couples who must deal with a looming biological attack.

Andy, Eriks grandfather, insists that he take more money, but Erik refuses, as he wants to prove that he can make it on his own. Misunderstanding Eriks motives, Andy accuses Erik of being too good to take his money, as it was made through the production of biological weapons. Although Andy admits that he knew that the research was likely unethical, his wife, Esther, brushes off his guilt and says that the money kept their daughter alive long enough to give birth to Eric. Meanwhile, the situation in the Middle East worsens considerably. Biological weapons are at first rumored to have been deployed, then proven. Although the United States urges calm, Europe suffers massive casualties as trade winds blow the toxins westward. Andy, aware of the worstcase scenarios, urges Sarah to take appropriate precautions when she attends to him and his wife. Sarah in turn alerts Len, who takes Mia into their basement. As panic spreads through the country following loss of contact with the East Coast, Rick attempts to purchase a survival kit. When he comes up short of money, he grabs one and begs to be given a chance for survival the owner shoots him as a looter.Andy and Esther survive through the use of oxygen tanks. Esther, an optimist, believes that Erik and Anna have survived somehow, but Andy, a realist, insists that they must be dead. Flashbacks interspersed with Andys and Esthers argument show Erik and Anna playfully flirting, having sex, and celebrating the news that Anna is pregnant. The flashbacks end with the apparent deaths of both Anna and Erik as they lie in bed. Andy and Esther set out to the local hospital to recover more oxygen tanks, where they discover Sarahs body. Discouraged, Esther begins to lose the will to live, but Andy encourages her with the knowledge that they have each other. At the same time, Len and Mia debate whether they should commit suicide together. Len is hurt by Mias admission that she failed to discourage a coworker from falling in love with he

Source: Wikipedia