It's May 1966 and at clinic Shelagh examines an overweight ladywho is expecting her third child. Concerned about her weightgain and subsequent symptoms, she discusses the case withLucille, who comes across a new discovery.Dr Turner and SisterHilda are flummoxed by a young patient whose health presents aseries of challenges. They become increasingly concerned and dotheir best to get to the bottom of her unexplained ill health.