Mistress Serena's personal slave is not a fan of corporal punishment, so she decides to use this fear to see just how far he will go for her, to test his limits and push them hard beyond thresholds of pain never experienced before. Serena starts with a brief spanking warm up, before moving on to more vicious tools from her armory. The intensity of this genuine session builds in real time and captures the absolute devotion Mistress Serena's slaves have to sate her cruel and sadistic desires...