Growing up among horses at her parents' stud farm, Zoé dreams of becoming a jockey and forms a deep bond with a young horse. A terrible accident threatens to end their racing careers, but they fight to reach victory together.
The trawler Marie-Morgane sinks suddenly and inexplicably with all its crew, including Captain Lenormand and his son. When Nolwenn Lenormand hears the news she's convinced that a submarine on maneuvers must have been responsible.
