When the residents of Bridgeville, Maine find themselves engulfed by a foreboding mist containing a myriad of inexplicable and bizarre threats, their humanity is put to the test. What will people do to survive when blinded by fear?

Kevin and the others reach the hospital, where Kevin has an unexpected and painful encounter with his brother, Mike.

At the hospital, Kevin becomes an involuntary test subject on what drives the Mist; after Nathalie discusses her theories about "The Black Spring," she has a violent encounter with Link.

The gang finds unlikely sanctuary in the psych wing of the hospital; tensions at the mall escalate about the remaining food rations; Nathalie and Romanov have a final confrontation.