On 18 June 1940, Charles de Gaulle's appeal was heard as far as the depths of the oceans. It is here that one of the War's most important resistance movements came into being: The Maquisards de la Mer. Heading it up was the submarine "Rubis". This film gives a voice to the forgotten members of the Resistance by means of unpublished testimonies and rare texts written by the Rubis' crew members.