Pup Milo sets off on an adventure around the world to track down what he thinks is his best friend's prized possession.

Baby Lincolns older sister, Eugenia, is very fond of telling Baby what to do, and Baby usually responds by saying "Yes, Sister." But one day Baby has had enough. She decides to depart on a Necessary Journey, even though she has never gone anywhere without Eugenia telling her what to take and where to go. And in fact Baby doesnt knowwhere she is headed only that she was entirely happy in the previous nights dream, sitting aboard a train with a view...