Postal worker Jenny's life is in the doldrums. Her daughter is all grown up and ready to face the world, her marriage is falling apart, and now her best friend and colleague tells her he plans to retire. So, when a postcard from Australia, begging the recipient for forgiveness but marked 'insufficient address', lands on her sorting table, she does the unthinkable - she slips it up her sleeve, with the intention of delivering it herself. Jenny...