Tania Boréalis ou L'étoile d'un été (2001)

Tania is a 13-year-old girl with problems with her weight. After her parents divorce, she hates to go on a holiday with his dad's new family that includes two skinny and pretty girls. When Tania tries to hitch-hike her way out of the holiday resort, she befriends a handsome young man more than ten years her senior. The result becomes a funny and sad comedy of errors.