Twilight Catastrophe has stolen the Eye of Osirus and the Staff of Pharfigruttentuttenruttenschnarfen to reanimate cat mummies to do his evil bidding. He plans to awaken Cleopatra's cat with the help of Bast so he can rule with her for all eternity. The Spy Dogs must go up against the millions of cat mummies and stop Catastrophe. Fetch Ralph becomes impatient with his master's wanting to play Fetch. But then Ralph has a flashback and remembers how the game of Fetch came to be, as told by his old teacher, Dahg Chow. The story relates to the very first Spy Dog, of the name ""Fetch.""