In the ancient city of Ningbo, a mysterious woman named "Ningbo Maidyue" was known for her strict training methods. She used a whip to discipline her female slaves, causing them to become breathless from fear and pain. Despite the harsh treatment, she managed to transform them into obedient servants who would stop at nothing to please their mistress. The secret behind her power lies in the psychological manipulation and controlling tactics she employed during the training process.