This is the last in the series of books 'A Dog Named Mutley.' Mutley gets a new lease of life when his mummy gets a new puppy called Evo. Mutley passes on all his worthwhile knowledge to her, so she can carry on his antics once he has gone. At the end of the book Mutley passes away from old age and crosses over to the Rainbow Bridge. His mummy is very sad but she has Evo to help her.