Charlotte is in for a nasty surprise when Emmy makes a new friend, Tom. For Tom's big sister, Icky Nicky, is in Charlotte's ballet class - and they hate each other! But when their sisters' fighting starts to get in the way of Tom and Emmy's friendship, they must find a way of bringing their warring siblings together, and ballet could be just the thing they need. And to Charlotte and Nicky's surprise, they soon find they have a lot more in common than they had realised.