At the end of the summer holiday, Louise, blind since birth, is smothered between her mother and her sister. After getting lost in the forest, a chance encounter on a naturist campsite will upset her habits.

Crustacés et coquillages is a fresh French comedy film with numerous surprise turnarounds and about the tolerance of a family of four. The family spend an idealistic summer vacation together where each of the family members gets involved in a new or old relationship.

"No drop of the fruitful liquor should be diverted from the female vase. All the rest is Fraud!" So spoke the young priest. 30 years later, the moral torture he then spread all over his parrishers' lives hits him in an unexpected kickback.