This qualitative case study aimed to focus on the experiences and subsequent science and science teaching beliefs, attitudes, and self-efficacy of an elementary pre-service teacher, Heather, with extremely positive attitude and high self-efficacy. For this particular population of pre-service teachers, possessing a high science teaching self-efficacy alone is not sufficient to assume reform-based beliefs and teaching practices. This study was unique in that it concurrently explored the relationship between attitude, beliefs, and self-efficacy before and after the course. Initially, Heather's attitude and self-efficacy with respect to science and science teaching were closely interrelated and a product of her own intrinsic interest in science and her unique K-12 experiences. Her beliefs appeared to have been shaped by both her actual science experiences and what she had witnessed in the classrooms. Heather's course experiences shaped her post beliefs about science and science teaching, which consequently altered her attitude and confidence.