Jeanne, a shy young woman, lives at home with her uninhibited bartender mother and works the graveyard shift as a cleaner at an amusement park. Her mother wants her to meet a man, but Jeanne prefers tinkering in her bedroom with wires, light bulbs, and spare parts, creating miniature versions of theme park rides. During her late-night shifts she begins spending intimate time with the alluring new Tilt-A-Whirl ride that she decides to call Jumbo. Finding herself seduced by “his” red lights, smooth chrome, and oily hydraulics, Jeanne concludes that the thrilling new relationship she wants to pursue is with Jumbo.