A highly contagious and constantly mutating microorganism was frozen and locked away in a highly secure military laboratory decades ago. The lowest level, where the deadly intruder was contained, was carefully sealed and unavailable for years. The facility is currently being sold and converted into a warehouse. As the climate changes, temperatures underground are rising, bringing a forgotten threat from years past to life. Two unusual warehouse workers and a retired government bioterrorism specialist will unexpectedly have to try to contain the microorganism as it breaks free from its prison and begins to reproduce uncontrollably.