As one of only a few female horse dentists in Australia, Bobbie Murphy is used to traversing the top end of Australia in her "goose-neck trailer", up to her elbows in blood, saliva and tonsils. But being the reigning "Mrs Australasia", her life is suddenly thrust into a maize of catwalks, make up, hair and costumes as she prepares to challenge for "Mrs Globe" in Palm Springs, USA. But she needs to ride a postie bike from Uluru to Darwin to raise funds for charity. Then comes the daunting challenge of mastering the catwalk. "Not the same as my usual walk to the kitchen for a smoke".