Die Kugel: Im Wandel der Zeit (2018)

Martin's mother denies her illness to her son. His father breaks the silence when Martin turns 13. The birthday party ends with the words "Leukemia". Martin flees into the forest, the sphere finds him. 3 years have passed, Yuri gives in to his weaknesses and loses the bond with his son. Omar is chosen by the sphere. Martin has to act. Who else is destined for Mars?