In Brignogan-Plages, thirty-year-old Zoé works with her father, Guy, at his bar "Les Bigorneaux". Since the premature death of her mother, she wears herself out by taking everything into her own hands. One morning, Zoé starts suffering from dizziness and nausea, which disrupt her daily life.

Mia is thirty and getting divorced. She moves into a studio apartment in a low-income housing project. As a former swimming champion, she now finds herself giving swimming lessons to the other inhabitants... Without a pool...