A street dog named Marley has to survive in Paris, France. She meets a male German Shepherd named Duke, and together they survive against foxes, cats, hunger, other dogs and of course, humans.
Louis has dogs. Lots of dogs. Lives in Alaska, and has a sled.
Which you can guess, is for dogsledding.
He's determined to win the White Wolf race in remembrance of his mother and tries to go cross country to find more dogs.
He gets lost along the way.
What happens next, you'll have to find out for yourself.