Follows Teacake (Keery) and Naomi (Campbell), two employees at a self-storage facility built atop a former military base, whose night shift transforms into a nightmare when a government-sealed parasitic fungus escapes from the underground levels. As temperatures rise, the microorganism unleashes its brain-controlling, body-bursting mayhem on anything in its path. The duo must join forces with a weathered bioterror operative (Neeson) to contain the threat before it triggers humanity’s extinction.