The Allen family loves their many pets, and they’re excited to adopt just one more - Henry, the bull-terrier. But why are dangerous men after him? He’s not telling, and the other pets must find out before someone in the family gets hurt: Why is Henry angry about being adopted? Can a dachshund actually concentrate for more than two minutes? What do Henry’s stalkers really want? Can a cat’s natural stubbornness foil a dastardly scheme of kidnapping and robbery?