This story is about how a talented and lovable (not to mention smart) wirehaired dachshund puppy named Howie saves the world from a disgusting, evil menace named....oops, that would give away the story.
Rex's parents are adopting a baby, and Rex doesn't like the idea at all. Suppose his parents are so busy with the new baby they forget about her? So she comes up with a plan. If she can be the perfect big sister, her parents will have to pay attention to her. The trouble is, being the perfect big sister is a lot of work, and it doesn't leave time or much else--like her best friend, Pinky.
With help from his Uncle Harold, who wrote books about Bunnicula, Howie the wire-haired dachshund writes a story in which he saves the world from a science experiment gone awry.