The Cry Babies are enjoying a peaceful day on Tropical Island. Lady is sleeping on Sia's Rock until a mosquito slowly approaches and... bites her! Lady begins to notice a strange feeling in her body. Scared, she realises that she cannot stop dancing! The mosquito bite has taught her how to dance all different dance styles: tango, hip hop, ballet ... And although she is now an incredible dancer, she can't stop dancing! At first, the other babies find it extremely funny, but then they realise the problem. So they search for all potential solutions to stop Lady dancing and stop the impact of the dancing mosquito's bite!