In the dimly lit chamber, a stern-faced dominatrix, clad in leather and latex, awaits her client. The sadomasochism master, known only as "Bertha," is an expert in the art of pain and pleasure. With a flick of her wrist, she sends a whip cracking through the air, the sound echoing like thunder. Her client, a willing participant in this dance of dominance and submission, shudders in anticipation, ready to surrender to her every command.