After Buck, the dog, died, Lucky comes to the Bundys and takes the place of his predecessor. Buck is in the form of a Spaniel, having been born again; he is being punished by God because of his enormous aggression towards cats. The dubbed voice of the dog remains unchanged, in order to illustrate this reincarnation. Al and his family does not notice that Lucky is the reincarnation of their first dog. In particular, Kelly and Bud love their four-legged friend, although they often have difficulties in handling the animal. In a relay, it turns out that Lucky will hump anything.