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.

Billy and Sir Hubert turn out in the course ""cat after assistance hour"" to the gauner Len and Denz, which found straight in the cellar of a house a treasure. In this house the Katzenomi with its favourites lives. Mr. Big, the Boss of Len and Denz, is the owner of the building and tried now to drive her and the other tenants out in order to be able to lift in all peace the treasure. Billy and Sir Hubert take care of the thing and are - after some existed adventures - able to prevent the evacuation and to deliver the gangsters of the police.

It is the evening before Halloween. While in the city of the totengraeber and its grausigen companion Klaus and James out-robs a bank, Sir Hubert its Billy and Queenie maintains friends with Gruselgeschichten. It tells of the ""lila shade of the fright"", which makes the remote Kuscheltierfriedhof of the city uncertain. A terrible nebula thing, from which no animal can escape. Billy dismisses that everything as superstitious gossip and separates from its companions. It hunts pitch that on the playground the Totschlaeger Toelen meets it, and it just on the animal cemetery, where they leave it to its fate. But also the totengraeber selected this place, in order to bury its booty. Billy, which hinterherschnueffelt, is hunted by two ugly cemetery cats into an open grave. Fortunately the eccentric mole appears Nestor and saves to it the life...