In the future, Brussels is the last habitable place on Earth. The city is flooded. Transformed into a vat and now overrun by wild beer yeast, Brussels is beginning to ferment. Faced with this threat, a group of residents is tasked with devising a strategy.

In the distant future, Brussels is the last habitable place on Earth, thanks to its regular rainfall. The city is flooded, and a thick gray sky forms an increasingly impenetrable lid over it. Transformed into a vat and now overrun by wild beer yeast, Brussels is beginning to ferment. Faced with this threat, a group of residents is tasked with devising a strategy.