David Drayton goes into town for groceries with his five-year-old son and the neighbor Norton. He left his wife at home in a small town in Maine—to clean up after the night storm and to wait for the electricians.
A strange fog comes from the direction of the lake, enveloping everything… Already in the store, David understands that something serious has happened… Something sinister in the fog blocks the way outside. To make matters worse is Mrs. Carmody, the local “abnormal”—she has her own interpretation of what’s going on…