On July 11, 1897, three men from Spitsbergen set off for the North Pole in a hydrogen balloon. They never return. 33 years later, a sealing ship discovers the remains of the expedition on Kvitøya, the northernmost island of Svalbard. This includes the bodies perfectly preserved under the snow as well as notebooks and film reels. Robin Hunzinger takes us into the story of the participants in Engineer Andrée's balloon expedition through the archives and the traces they left behind in a story structured like a crime thriller.