Every street should have a dog like Jack. And every abandoned dog should find a new family like the residents of Christmas Street—a group of people who just might need Jack as much as he needs them . . .

All day, he trots happily between the terraced houses, receiving treats and toys, offering a tail wag or lick in return. For Sam, a widower recently returned to London, Jack is Christmas Street's unofficial welcoming committee. For Sam's young son, Teddy, the small, scruffy mutt is much more than that—he's a confidante and Teddy's much-needed and so far only friend.

But other neighbors also rely on Jack for company, including Bill, the street's oldest, grumpiest resident. Bill remembers when everyone knew and looked out for each other. Now, people live side by side for years, scarcely interacting. Jack—with some help from Sam and Teddy—is starting to change all that . . .