Owen Baker (Liam Aiken) is a 12-year-old who has been working as the neighborhood dog-walker so he can earn the privilege of getting a dog of his own. Owen’s hard work pays off when his parents, Mr. and Mrs. Baker (Kevin Nealon and Molly Shannon), let Owen adopt a scruffy Border Terrier that he names Hubble (voice of Matthew Broderick). Owen has little time to make lasting friends, so he hopes Hubble will be his best friend.