After her parents’ passing, eight-year-old Violet goes to live with her uncle, Regis, a gruff maintenance worker at the Palace of Versailles. Despite a rocky start, Violet and Regis learn to live and face life’s challenges together. Through complex friendships, first loves and a Christmas trip to Violet’s grandparents, they slowly create a new life rich in discoveries and tender moments in the heart of Versailles.

As the dreams of Didier Mathure, a brilliant space engineer, literally go up in smoke when his rocket explodes on take-off, he is transferred to head GEPAN, a unit specializing in UFOs. He is tasked with coming up with scientific explanations for the UFO sightings that are currently dominating the headlines. This is a nightmare job for a die-hard rationalist like him, and he is determined to find a way out as soon as he can.