After a distinguished career in the French Navy, 77-year-old Régis Morel spends most of his time on his own boat, a 12-meter sailboat. But one day, a significant event abruptly confronts him with his past, abruptly disrupting his tranquility. Sixty years later, he finally has the opportunity to have his paternity recognized in the name of the child he once was, and to exercise the rights that come with it. But Régis finds himself facing a family of provincial notables clinging to their fortune and their high opinion of themselves.