Alex and Noemie would like to have a baby but their plans are turned upside down when Alex`s mother, Suzanne, starts doing crazy stuff. It`s because she has contracted `semantic dementia` - a fatal neurodegenerative disease that affects her behavior. She spends lavishly, pays nightly visits to her neighbours to eat sandwiches, and makes herself a fake driver`s license with glue and scissors. Alex and Noemie have to learn to parent her and go through a strange school of parenting.