Lord Marcel de la Mont de Anges, the Marquis de Montespan is a brilliant mathematician, member of the mechanical animation movement and all around dandy. He's been in love with shy, quiet entomologist and youngest member of the royal family, Prince Gilbert André XVI, since they were children. The Emperor's plans to arrange a marriage between Marcel and Gilbert should have been the answer to all his secret fantasies.

But Gilbert is still reeling from a nasty breakup, and he cannot picture the man he regards as a brother becoming his lover. The order to marry has thrown their relationship into disorder, and if they cannot sort out the changes there may not even be a friendship left for them to save…