Snooper and Blabber are on a stakeout by the bridge over the river when Snooper sees a suspicious black car speed onto the bridge and drop a bag into the river. He and Blabber get the bag out of the river and find that Aloysius the millionaire cat was inside and he tells them about the plot to rid him of his fortune. It seems that the butler, Hives, has teamed up with a pint sized con artist named Crumpet to get rid of Aloysius and take his fortune. Crumpet has dressed up just like Aloysius in oder to fool everyone and he and Hives are going to split the fortune between themselves.
Snooper, Blabber, and Aloysius arrive at the mansion and hear Hives and Crumpet discussing the money and Snooper has a plan. He has Aloysius play the part of the bait while he and Blabber try adn stop Hives and Crumpet. After a couple of funny failures, they finally get Hives and then the phony Aloysius. Hives has recovered and tells Aloysius that he is sorry and offers to take out the phoney. Aloysius forgives him and he takes out the cat.
Later, Snooper and Blabber try and collect their reward only to find out that they had clobbered the wrong cat. They accidentally clobbered Aloysius and now Hives starts chasing them with a pistol.