An American couple visits a nightclub in Mexico, but they are unimpressed by the staged shackles and fake role-play. They demand something more "authentic."

Led by a shackled waitress, the couple is introduced to Mistress K, who shows them a selection of gagged and bound women for rent or purchase in the club’s basement.

The couple selects Anne, a young art student, and rents her for the night. Anne's fear intensifies as the couple decides to buy her as their permanent sex slave.

Anne is taken to the couple’s mansion in Texas, where she is trained to serve them as a "fuck-pet," forced into the most degrading and humiliating situations.

Cramped and bound in a steel cage in the back of the couple’s truck, Anne’s journey to her new life as a pet begins, filled with fear and despair.