Down on his luck, a mild mannered mice named Leroy McKenzie is a Karate instructor turned avenger. Due to the bad economy that we have at the present day, our mice from the Daily Dojo takes matters into his own hands. After losing his job and forced to abandon the home he built himself, he decides to bring the house down to the ground along with the Fat Cats who swindled him out of it. Now he is forced to help others less fortunate like him, to take back what the Fat Cats have stolen. Thus the stage is set and we now have one Angry Mice!