Plumbing. This is what the future has in store for Billy Box - to follow in the footsteps of generations of Boxes and spend his life with his arm down people's toilets. Or so he thinks... For when an angel appears on his 11th birthday, Billy's life suddenly takes an unexpected turn. His destiny is now to be a Guardian Angel and his first task is to protect Thelma Potts, the toughest girl in school. Billy soon finds himself caught up in a world of competitive pie eating, skeletons and magic, not to mention smelly drains!