David, a wealthy man living on a Texas ranch, carefully selects a beautiful Mexican girl for whom he provides handsomely. In return for a generous salary for household duties and helping out in his office, Sonia is to share his bed, be obedient at all times, and submit to his discipline. Although Sonia is a quick learner, once settled in to her new life her domestic duties begin to slip and she is punished. Sometimes she requests punishment herself when she knows she has done something she shouldn't have. She is delighted when David regularly lavishes money on her for new clothes, make-up and jewellery, and as she gets used to the discipline - sometimes severe - she proves to be stoical and accepting of the other women that David spanks. This extends to David allowing his friends to spank Sonia too. He builds a punishment room in which he disciplines his staff, and the next big event is a spanking party. Realizing he wants to make their relationship more permanent, David arranges for Sonia to study and major in accounting. Lapses in study are dealt with in the usual manner ... and an engagement ring follows...