On a farm in Pennsylvania, Valentine is one of seven brown Labrador puppies in her family. There, she enjoys playing with her brothers and sisters on the fluffy green grass, looking at all the different farm animals-and even jumping in the pond for a swim But she knows she won't stay there forever. Her trainer Judy says someday she'll go to live in a new place with a new family who loves her very much.

And when she wakes up one day in a busy airport, Valentine knows the time to meet her new family is finally here. After giving her a collar with a pretty red heart, a kind man and...