In a lavish BDSM den, Mistress Medea Mortelle and her maid, Yara Frei, await Cosmo's arrival. Yara, in uniform, is helpless as Mistress attaches a spike ring to her teeth, ready for Cosmo's cock. When he enters, Yara services him expertly, but Mistress intervenes, making Yara suffer through chastity and denial. Cosmo's cock throbs, desperate for release, but Mistress is cruel, pushing Yara's boundaries with facesitting and CBT, leaving her a quivering, desperate slave girl, longing for her Mistress's touch.