This is the story of Rosie Revere, who dreamed of becoming a great engineer. Where some people see rubbish, Rosie Revere sees inspirations. Alone in her room at night, shy Rosie constructs great inventions from odds and ends. Hot dog dispensers, helium plants, python-repelling cheese hats: Rosie's gizmos would astound - if she ever let anyone see them. Afraid of failure, she hides them under her bed. Until a fateful visit from her great-great-aunt Rose, who shows her that a first flop isn't something to fear - it's something to celebrate.