Carla is no stranger to discipline, but when she stays with Joan, a family friend, and her son David, things quickly begin to develop in a most unexpected way. Joan doesn't hesitate to spank the 18-year old Carla when she misbehaves, and it isn't long before David not only witnesses the spankings but delivers them too. Carla is embarrassed because she has had a crush on David for years, but her feelings turn to lust when he orders her to undress. Petting leads to sex, and Carla begins to understand her submissive nature and her need to serve. Her relationship with David changes - he becomes her Master and she his willing and obedient slave, subject to pain and pleasure and humiliation.

Matters accelerate when Joan gets more intimately involved, announcing that Carla can be David's slave during the day, but her slave in the evenings. Thus Carla experiences the delights of both a Master and a Mistress. Naked, she wanders round the house wearing a collar and leash, and endures punishment spankings and paddlings. Her tormentors have exciting things in store for her involving clothes pegs on her nipples and thighs, forced masturbation and orgasm denial. Carla's sexual relationship also extends to Joan, and she finds herself obeying her mistresses demands. But it is David in whose bed Carla sleeps every night, to be punished and pleasured as he sees fit.

More than content with her week as a slave, Carla doesn't want it to end, so when an opportunity arises to make things more permanent, she embraces it wholeheartedly.