Living with Duchenne muscular dystrophy, an illness that is causing him to lose the use of his body, Kaïs is awoken every morning by a different member of his family. One after the other, they share the impact of this disease on their life. But the optimism of Kaïs is a source of strength for the whole family and he finds in his passion for manga a way to escape… So at night, he dreams of being a hero of his favorite manga with his brothers, Fehd, the bodybuilder and Zaïd the ninja.

Together, they must face the Dystropher, a terrible intergalactic villain who wishes to conquer the Earth.