Bound at the wrists and ankles, Mena Lis is presented with her first challenge - the intimidating Sybian machine. Her mistress teases her, running a vibrator along her slit, making her squirm and moan. Then, Mena is lowered onto the machine, its powerful vibrations against her clit sending jolts of sensation through her. She's ordered to suck on a thick, veined dildo, struggling to take it all in as her mistress holds her head in place. The machine's speed increases, pushing Mena to her limits. She cries out, her body convulsing as she's brought to the brink of orgasm, only to have the machine abruptly stopped, leaving her hanging, desperate for completion.