Tom is ten and different from the other children. He doesn't like change, red things, and anything loud quickly becomes too much for him. His specialty is space. He loves running around in his astronaut suit and likes to wear a helmet in challenging situations. When his mother unexpectedly has to go to China, Tom has to move with his siblings Nina (15) and Elmar (13) for six weeks to Grandma and Grandpa in the countryside in Lunau. This is a disaster for Tom. But to make sure he makes it anyway, his mother gives him a logbook and suggests that he see the trip to his grandparents as a trial Mars mission. Tom's greatest wish is to be the first person to fly there. "If you can do Grandma and Grandpa," his mother assures him, "you can definitely do Mars." And so Tom unceremoniously appoints his permanently phoning sister Nina as a radio operator and the hyperactive Elmar as first officer. Together with his crew, he tries to explore the planet Lunau and to understand grandma and grandpa, who seem to live by their own rules.
GREETINGS FROM MARS is a funny and touching comedy about the big goals of an outsider whose otherness is at the same time his secret strength and which brings together two generations that at first face each other like beings from strange planets.