Baptistin, Quentin, Robin und Yvan are four engineering students returning from an extraordinary five-month expedition. In March 2022, they left Lorient with Kahuna, an electric sailboat, to ride the slopes of Norway and Svalbard. Boosted by permanent polar light, the team completed 40 mountain trips, including a first descent of the north face of Storelenangstinden. Kahuna is a homemade expedition. At 22 and 23, the four decided to do everything themselves: skiers, sailors, cameramen, editing… In a light and youthful tone, this film recounts an arctic adventure as demanding as it is inspiring.