In the not too distant future, a space flight leaves on a high-risk mission. Destination: Mars. The astronaut experts on board come from the United States, Russia, China, India and Great Britain. They know they have to part with their home and their loved ones for three years, as long as everything goes according to plan. This period will put a strain on close ties on Earth and in space, as the crew will do what they can to survive and reach the most ambitious milestone for all of humanity. The world holds its breath.