Having really bad dreams every night is no fun at all. Fatou is really fed up! Ah, why can’t she dream of Santa Claus, his helpers, presents, but no, her nights are haunted by Mrs. Férule and the multiplication tables! The horror! Roger is quite touched by her distress and decides to create a real-fake-beautiful dream for Fatou. With Walter in disguise, making Fatou believe that she is dreaming (whereas she isn’t), Roger performs an idyllic dream, the perfect illusion. Fatou is in seventh heaven, everything seems so real. Problem for Roger though: the fake dream turns into a real nightmare...