Roman is a top athlete, who yearns for individual success. So far, however, he has always been in the position of a domestique, a bicycle racer who sacrifices for the team. Now he is recovering from an injury and it seems that strenuous training and strict diet are not enough. Roman decides to install an oxygen tent in his apartment. His wife, Charlotte, is not too happy about this. She has been longing for a baby for quite some time now. Both begin to dwindle in their obsessions and slowly transform their bodies. Every day their relationship changes. Domestique is a claustrophobic drama and horror of the body.