Laura is trying to persuade her doctor to give her some time off work, she wants him to say she is too ill as she has a bruise on her bottom. The doctor spots a chance here to indulge his favourite pastime, spanking the bottoms of as many young ladies as possible and so makes a deal with Laura, she must take a real hard beating in return for the certificate, she has to agree but did not realise just how hard the wicked doctor was going to beat her. She really does leave the surgery with more bruises than she came with.