William Albert Robinson became famous in 1931 after a world tour of more than 3 years on a sailboat of only 10 meters long. In 2019, a research centre in his name was inaugurated in Tahiti where he fought to eradicate filariasis. Between these two dates, the film traces the extraordinary life of one of the last navigators of the 20th century. But the film also seeks to reveal the intimate truth of an elusive, complex, and fascinating man.