Alain and Marie move to a quiet suburb. A mysterious tunnel in the cellar of their new home will turn their lives upside down.

In this film Quentin Dupieux plays the surprise card. What is in the cellar? Why and how does it shake up the couple's lives? The answers can only be found in the darkness of the movie theatre. But it is another crazy and resourceful story from Dupieux who has more than one trick up his sleeve!