In the not-too-distant future, humans want to set foot on Mars, even colonize the hostile planet. The studies on this endeavor offer surprising perspectives on the ecological crisis on Earth. Discussing space travel, architecture, ecology, and the cities of tomorrow, this documentary essay unfolds a philosophical mosaic about our living spaces. What begins as a technological utopia leads to the central questions of our time. How do we want to live, work, and do business in the future?