14-year-old Mo Tamworth keeps up a tough front while hiding her despair about her disability. She is especially miserable about how she looks during the three swimming lessons a week that she must take for remedial exercise. When horseriding is suggested as an alternative, she is overjoyed. However, when Mo starts learning to ride, she is forced to confront her attitudes to imperfection -- both in herself and in others. In the process, she comes to the realisation that the world is not divided into "whole" and "deficient" but that all people have their own level of handicap and even bullies...