Jonah Hauer-King and Ashley Judd star in this family adventure drama based on the book by W. Bruce Cameron. When Lucas (Hauer-King) adopts a puppy he calls Bella (voice of Bryce Dallas Howard), the two quickly become inseparable. As Bella grows, so does Lucas's affection for her so when she runs away his life is turned upside down. Will Bella be able to find her way home?