Mon frère, ce super-héros

"Superbrother" tells the story of Anton, a 10 year old boy desperate for, he says, an older and true brother as Buller, his brother, is autistic. Always distracted looking at the sky, Anton receives an unexpected visit from some stranger who comes from space and Buller becomes a superhero. Unfortunately, these powers do not last forever. Will they be able to learn to use them?