After getting divorced, a man's body gradually becomes more and more disabled. Living alone with his son, he hires a caregiver to help with daily tasks. The caregiver initially appears to be a kind and innocent woman, but in reality, she is a monstrous sadist. When the son isn't around, she beats the father's limbs with a cane, tortures his weakened body with cold water in the bathroom, and forces him into fecal shampooing and urine assistance. If the father attempts to report her urine drinking restrictions or abuse to his son, she punishes him with enforced coprophagia. Just who exactly is this woman?