France has been confined again for several months. Anna is pregnant. To allow her companion Victor to join her before she gives birth, they have to get married. A dematerialized procedure has just been set up. But the law changes every day.

Summertime. While a pandemic spreads overall, Paul, his wife Hélène and his little sister Lisa, isolate themselves in their countryside house. There, they meet old friends : Bruno and his sister Mélanie… Some of them love each other but say it wrongly ; some of them don’t even dare to say it ; some of them hate each other… What will strike them first? Disease or despair?

In a film consisting entirely of fictitious found-footage, we discover how a young activist, Ulysse, provokes a nationwide cataclysm by stealing a micro-organism developed by a state laboratory: the "mycelium". This microorganism has the ability to degrade all metals and their components, and its spread would risk taking the whole of civilization back to the Stone Age.