Billy is an impudent rascal, who torments cats with its rotznasigen Kumpanen with preference. A daily drives it it too far and excites the anger of Ali, the magician. To the punishment it transforms Billy into a small cat, so that it sees, as it is, in the skin of an animal to be been. Now he victims of pursuit by its friends, is rushed by graesslichen dogs and killed near in an abort house. But a rescuer in the shape of Sir Hubert, an eccentric cat with English ancestors appears there. It leads Billy to different fodder places, only unfortunate that Billy everything finds disgusting, what Sir Hubert appears koestlich. It leads it also to its magnificent living place, an old Cadillac at a scrap iron place. There Billy saves the pigeon jumbo jet from the always hungry Sir Hubert.

Billy is cross unfortunate. All make themselves merry over it, because it does not behave correctly kaetzisch. Blackie and its hard young do not want to accept him to the road course, because it is not tough enough. It cries itself with the bronze lion for the museum out, when Queenie appears, in order to show it the golden statue of the cat goddess Bastet. But then the two must regard with, how the statue before its eyes is stolen. Les and that, which became both being suited niece, by the mysterious Mr. Big angeheuert to rob the work of art. Billy, which wants to prove that he has the heart of a lion, pursues the criminals in the house of the rogue. Queenie and Sir Hubert, follow him there, and become witnesses, how he puts to also again the handicraft discovered courage and carat impacts the grausigen Sanctifur.

The cat municipality is in joyful riot: Cat Martha brought three finery-lively boys to the world. Billy, which face the whole one rather coolly, and Sir Hubert are godfathers. But then they experience that the three kaetzchen were away-given. At Billys former buddy nod, who promised to find for it a good at home. But Billy remembers, how it went out at that time, when it handed its small alligator to it over. The animal was thrown cold-bloodedly into the lokus. Therefore pursues he nod. Meanwhile the basket with the kaetzchen in the river landed. Billy afterwards. Luck in the misfortune: They are rinsed ashore, but unfortunately in the territory of the Totschlaeger Toelen. On the escape before the blood-greedy Koetern Billy leads its small crowd directly into drains.