In L'orpheline avec en plus un bras en moins, Éléonore, a young woman missing an arm since birth, leaves her orphanage when Judge Georges London takes her under his protection and legally adopts her. Unbeknownst to Éléonore, her respectable new benefactor harbors a sinister obsession with her, secretly spying on her through a two-way mirror in his estate. Her life grows more complicated when she falls in love with Robinson, a cabaret magician who operates under the shadow of a shady mentor. Consumed by jealousy and viewing the young magician as a rival, Judge London exploits a string of horrific local murders targeting young women to frame Robinson and eliminate him. As Inspector Lamentin investigates the crimes, Éléonore remains trapped between the man she loves and her possessive adoptive father.