For thousands of years a war has raged right under the noses of human beings and we‘ve never even suspected it: cats and dogs just don‘t get along. Each side has been locked in a stalemate, never having the upper–hand, always locked in a secret battle. Now the dogs may be close to winning: Professor Brody is close to discovering a formula that he hopes will eliminate his allergy to dogs, thus allowing those who can‘t come close to canines the opportunity to finally come face–to–face with man‘s best friend. Little does he know that the cat society has sent its operatives into his family‘s home to sabotage Brody‘s work so his formula has the opposite effect and makes everyone allergic to dogs.