Carl is on his way to his summer holidays on the Magdalen Islands, where he and his old dog Mooch had so much fun.
This time Carl is going with his friend Gary and Gary's dog Dumpling. Terrified of everything, Dumpling clings tightly to Gary.
Carl can't help remembering his noble and magnificent Mooch.
The more ridiculous Dumpling becomes, the more Carl is convinced that he has to do something to honour Mooch's life.
This is a book about friendship, courage and grief.