We've got to get to the hospital!" protested Dan. t's freezing cold and heavy snow is falling, blocking the roads to the valley where Dan lives. Then there's a power cut and all the lights go out. But Dan has an emergency to deal with. His mum is having a baby and has to get to the hospital - quickly! Brave Dan has promised to look after his mum. He's determined to help the ambulance as it battles through the terrible blizzard...