After the Great War, the traumatized Yser striker hero Casimir Van De Velde returns home. He's not amused to see his dog sister Coralie turn it into a virtual orphanage and home for other stray kids while his father, an even worse traumatized but now exuberant sniper, has to be chained up in a barn. However, Casimir soon takes the children and becomes more protective of the irregular commune, upsetting the municipal authorities, who want the children to be placed in official care and the land used for a project of the business ally of the Mayor French colonial cavalry veteran Latiff was hired by a gang of ruffians to hunt them down, but decides to band together and fight the demons.