Antoine is the Head of HR of a big company. Managing people is his thing, so when his overwhelmed wife suddenly decides to go on holiday and leave him with the responsibility of the house and their four kids, he knows it will be a piece of cake for him. But Antoine has drastically underestimated the mess that four mischievous kids can cause...

Every summer, 10-year-old Dune goes with her parents to the south-west coast of France, where she meets her best friend Mathilde. Together, they explore pine forests, contemplate the shape of clouds, follow teenagers and crash their parties, and secretly watch horror films. But this one summer is special for Dune – last year, the family skipped their usual holiday without her knowing why. She feels that something has changed. As childhood becomes a little more distant, she begins to see adults and teenagers differently and understand their secrets.