The narrative centers on the discovery of a "Fountain of Youth" within the couple's new home—a hole that allows those who enter to travel forward in time by three days while physically de-aging by several hours.
The film parallels this supernatural plot with a secondary story involving Alain's boss, Gérard, who attempts to combat his own aging through a "technological" upgrade—an electronic penis.
While Alain (Alain Chabat) remains largely indifferent, Marie (Léa Drucker) becomes dangerously obsessed with the hole's rejuvenating effects.