Unknown Person

When a mutating, highly contagious fungus escapes a sealed facility, two young employees – joined by a grizzled bioterror operative – must survive the wildest night shift ever to save humanity from extinction.

A screener at the British Board of Film Classification (BBFC), who has earned an unsavory reputation for being the strictest censor of violent films, begins to spiral out of control after viewing a low-budget horror with similarities to the disappearance of her sister.