1979, en pleine guerre froide, deux familles ordinaires d’Allemagne de l’Est rêvent de passer à l’Ouest. Leur plan: construire une montgolfière et survoler la frontière. Une histoire incroyable. Une histoire vraie.

Alma is a scientist at Berlin's famous Pergamon Museum. In order to obtain research funds for her studies, she accepts an offer to participate in an extraordinary experiment. For three weeks, she must live with a humanoid robot with artificial intelligence designed to allow it to morph into that of her ideal life partner. Enter Tom, a machine in human form, created to make her happy.