This is a sci-fi drama about bioscientist David, who works on a cure for a zombie infection during the outbreak. His assistant, Erin, helps him with experiments on lab rats. She advocates for ethical animal handling, while David’s priority is the immediate success of the research. After the facility gets attacked by zombies, David gets blocked in the laboratory for days, with only a lab rat keeping him company. As David’s situation gets increasingly hopeless, he finds himself competing with the rat for the little remaining food and water.