One warm night four children stood in front of a bakery. No one knew them. No one knew where they had come from. They used ot love alone in a boxcar but now they live with their grandfather. They've just made a new friend named Beth. Between them they form a service called The Boxcar Helpers - they babysit, wash cars, mow lawns and care for pets. But Beth keeps disappearing and things began to go wrong. Is someone trying to put them out of business?