A routine night shift at a highly secure research facility quickly turns into a nightmare when a dangerous experimental fungus suddenly escapes from containment. The organism is not only extremely contagious, but it is also mutating rapidly, making it unpredictable and nearly impossible to control. As the infection begins spreading through the building, panic grows and the situation escalates into a life threatening crisis. Two ordinary employees who happen to be working that night find themselves trapped inside the facility as alarms sound and safety systems begin to fail. With little preparation and limited resources, they must rely on their instincts to stay alive. Soon they are joined by a hardened bioterrorism operative who understands the deadly nature of the outbreak and the catastrophic consequences if the fungus spreads beyond the facility. Together, the unlikely team must fight their way through infected areas, face terrifying mutations, and attempt to contain the outbreak before it reaches the outside world. What begins as a normal shift becomes a desperate race against time to stop a biological disaster that could threaten the survival of humanity.