François Allain unearthed a Half-Track M16 dating from 1943, a military machine designed and used during the Second World War and very popular with history buffs. Its restoration looks complicated. Indeed, the vehicle is capricious with, in particular, a defective rear axle. The expert then gives an appointment to the scriptwriter and director Serge Tignères, the reference of modern historical documentary, on muddy and rough terrain for a reconstruction.