Carl's on his way to summer holidays in the Magdalen Islands and he can't help remembering his dear, departed dog Mooch, his best pal on so many trips past. Especially since his friend Gary's annoying puppy Dumpling has been yapping away in the back seat for days.
Mooch was a great and noble dog, Dumpling's a whiny little furball, afraid of his own shadow. He won't fetch sticks, and he's always getting tangled up in something. But when Gary get sick, Carl is forced to take care of Dumpling--and soon finds out he isn't so bad after all.
Missing Mooch is the story of how one boy comes to terms with the loss of something he loves, with some unexpected help.