Nine year-old Noah comes to live with her mum who recently moved to Benac’h, an island off the Brittany coast, where she found a job as a waitress in a restaurant.

When she arrives, Noah discovers that all the children living on the island have known each other forever, and they all sail. Noah dreams of sailing and of taking part to the annual regatta! Except that her mother can’t afford to pay for sailing tuitions...

How will Noah, now nicknamed “Mussels” by the island kids, manage to sail and fit in?