Trapped within an eerie mist, the residents of Antonio Bay have become the unwitting victims of a horrifying vengeance. One hundred years earlier, a ship carrying lepers was purposely lured onto the rocky coastline and sank, drowning all aboard. Now they’re back – long-dead mariners who’ve waited a century for their revenge.

Strange things begin to occurs as a tiny California coastal town prepares to commemorate its centenary. Inanimate objects spring eerily to life; Rev. Malone stumbles upon a dark secret about the town’s founding; radio announcer Stevie witnesses a mystical fire; and hitchhiker Elizabeth discovers the mutilated corpse of a fisherman. Then a mysterious iridescent fog descends upon the village, and more people start to die.