Counting down to a Chernobyl-scale disaster, the clock starts now... Tick...Scientist Marion Kagan is the sole survivor after gunmen attack the facility where her team was working on a top secret project. Wounded and trapped in a collapsed building, Marion must stop radioactive test samples from leaking out and killing millions. ...tick...In a Connecticut psychiatric hospital, Marion's twin sister, who has been in a comalike state for years, begins...