Just as Henry Huggins is complaining that nothing exciting ever happens, a friendly dog sits down beside him and looks pleadingly at his ice-cream cone. From that moment on, the two are inseparable. But when Ribsy's original owner appears, trying to reclaim his dog, Henry's faced with the possibility of losing his new best friend. Has Klickitat Street seen the last of rambunctious Ribsy?

Henry Huggins makes a deal with his father--if Henry can keep his dog Ribsy out of trouble for a month, he can go fishing with his father. Ribsy does his best to make Henry lose the deal.

For the well-meaning Henry Huggins, nothing ever works out quite as planned including getting the bike of his dreams. Luckily his pal Beezus Quimby is there to help! Henry's attempts at raising money for his bike fund keep falling flat. Selling bubble gum on the playground gets him in trouble with his teacher, and then Ribsy's nose for mischief almost ruins Henry s paper route. Even pesky little Ramona Quimby manages to get in the way of Henry's chance...