Can Homo sapiens evolve into Homo spatius? For over 50 years now, we have been testing our human nature in our effort to conquer outer space, and still 30 years away from a possible human exploration of Mars, a question remains: Can our body take such travels? Will it ever adapt? Combining human adventure and the exploration of the human body, this film offers unique insights into the physical and psychological effects of space travel on the Astronauts and measures the impact on medical sciences.

Marc, in his 40s, is a professor of literature at the University of Lausanne. Still a bachelor — and still living with his sister Marianne in a huge, isolated chalet that they inherited when they were very young — he carries on one love affair after another with his students. Winter has almost ended when one of his most brilliant students, Barbara, suddenly disappears. Two days later, Marc meets Barbara’s mother, Anna, who wants to find out more about her vanished daughter.