An afternoon in a city. Playing basketball, a group of boys wonder about the relationship between men and women, about virility and seduction. In a building nearby, five girls will meet and wonder about the world and the relationship of tomorrow.

The Stievenart family decides to spend their vacation far away and puts an ad on the internet. The Mailon family responds by offering to exchange homes. But the Stievenart family has an environmentally friendly house, while the Mailons consume a lot of energy.

They are possessive, benevolent, clumsy, absent, omnipresent, overwhelmed, guilty, indulgent, loving, fragile, in full possession of their wits, or losing their heads. Alive or already a memory. They are mothers, and it’s their party.

An actor faces a tough audition, and a difficult challenge in proving that the part should be theirs.

At 21, Zoe is sick and tired of everyone taking her for granted, just because she’s young. She dreams of a day when all millennials go on strike, so that people finally recognize their true value.