After a deadly virus gets out in a small town in the US, a group of 4 scientists are tasked with finding out how to stop it.
They are sent to a secret facility which is 4 levels, with each level more safety procedures are required. One is given a key to wear around thier neck at all times, i guess to stop the facility from self desructing in a worst case scenario.
Most of the movie is set inside the facility.
Is the movie based on a true story?