Rosie lives in a playhouse with her colourful group of friends. Together they embark on adventures as they learn the meaning of true friendship. When Raggles boasts to Will that he has beaten Rosie in a race he doesn't know that Rosie let him win. Buoyed up with his achievement Raggles challenges Will to a race. Will is convinced he will win, but Rosie is secretly worried Raggles will lose. Rosie decides to help Raggles with his training and much to Will's disappointment, Bluebird volunteers to be his trainer. When it comes to the race both Will and Raggles are tired out with training. Rosie declares the race a draw when neither Will nor Raggles reach the finishing line!