Follow Dan and Mya on their journey around the human body as they're shrunk using exciting new technology. Propelled around the blood stream, hurlted down windpipes and escaping from white blood cells Dan and Mya discover inside the human body.

Body mechanics -- Prologue: looking inside -- Cruising in the circulatory system -- Riding the respiratory system -- Diving down the digestive system -- Intercepted by the immune system -- Scaling the skeletal system -- Must be the muscular system -- Navigating the nervous system -- A world inside us all.