In recent years, the science education research community has become increasingly interested in the learning domain of Einsteinian physics (EP). While the literature has provided accounts of how EP education can impact secondary and undergraduate students' attitudes and engagement with physics, we still lack such research with younger students. This exploratory case study addresses this need and adds to our knowledge of how middle-school girls' experience EP in the classroom. We report on an EP programme run with 39 girls (14-15 years) in an independent day and boarding school in Australia. Based on a phenomenographic analysis of focus group interviews and open-ended questionnaires, we document the range of students' experiences of EP. The analysis revealed three categories of description that correspond to a personal, scientific, and holistic way of experiencing EP. These experiences influence the girls' perception of and orientation to physics by increasing interest in physics, challenging traditional stereotypes, and showing future possibilities such as career paths in science. Our findings inform a discussion about improving instructional practices in science classrooms to realise the full potential of EP education. Furthermore, our study adds to a growing body of research that aims to foster middle-school girls' interest in physics.