"Oscar et la dame rose" presents the letters sent to God by a ten-year-old child. These letters were discovered by Mamie Rose, the "dame rose" who visits him at the children's hospital. They describe twelve days in the life of Oscar, twelve days that are quirky and poetic, filled with funny and moving characters. These twelve days might be his last twelve. However, thanks to the strong bond of love formed with Mamie Rose, these twelve days will become legendary.