When a deadly strain of bacteria breaks loose inside a top secret laboratory, a military containment squad appears out of nowhere to lock down the sprawling complex. But as soon as local sheriff Cal Morse (Sam Waterston) arrives on the scene, he makes a horrible discovery: His wife (Kathleen Quinlan) is one of the infected employees trapped inside. The good news is, she doesn't show any signs of infection -- but can he get her out in time?