Wiseass is an aging hit man with one last mission to complete before dying. He's even escaped from his retirement home to pull it off. There's just one problem: what with his Alzheimer’s, he can't remember what the mission was.
Mathilde, a victim of revenge porn, has found herself caught up in a spiral of cyberharassment. She’s on the verge of suicide when Mariole offers to help her get revenge. In exchange, she must promise to help him. Together, they hit the road to achieve their missions, each the other’s guardian angel.