Nine and her friends have broken the curse on their marvellous, magical House, and are free to travel the worlds once more. There's only one problem: the House is nervous about travelling - and gets the hiccups! With every HIC! they bounce from one world to the next, and magical mayhem erupts in every room. They try a drink of water (turning on all the taps) and giving it a fright (landing in a monstrous world), but nothing seems to work. Only the magical Tower of Unanswered Questions can help them - if they can make their way through a series of tricks, riddles and challenges. And perhaps Nine can finally discover who left her the beloved music box, and who she really is.