Follow the summer of Billie's 16th birthday, a lifeguard at the water park, with her two best friends, Rosine and Juliette, as well as her perfect big sister, Annette. Billie's summer is quickly turned upside down when she falls in love with a charming cycling champion.

Faced with the trials and obstacles of life, the tight-knit community of Ste-Adeline has always remained united. But this time it's in shock and will have to face a situation that will confront the inhabitants with their contradictions. At the center of the scandal, Magalie, a teenager with a childish pout, Manuel, the adopted child of the village's emblematic mayor, and Isabelle and Chantale, protective mothers but powerless witnesses to a predicted tragedy. In Ste-Adeline, appearances are deceptive and the layers of a carefully maintained social veneer end up cracking, revealing the true nature of the inhabitants of this peaceful little town.