In a dilapidated cinema, the quirky undead Penny Dreadful, her enamored zombie friend Ned, and the werewolf Wolfboy share three spine-chilling stories: In “Slash-in-the-Box,” a young couple is pursued by a deadly jack-in-the-box; “The Morning After” follows the timid Alice as she attempts to piece together the events of the previous night; and in “The Slaughter House,” a group of friends meets an odd rural family when their van breaks down in a remote area.