Pussyfoot is napping on a plush pillow when Claude kicks her off to claim the pillow for himself. Marc Anthony attacks Claude in retaliation, returns Pussyfoot to her pillow and begins to clobber Claude. Marc Antony is almost immediately caned on the head by Filbert, the animals' stodgy master; having only seen Marc Antony pummelling Claude, Filbert gives Marc Antony a final warning to leave the cats alone.
After this, the conniving Claude schemes to convince Filbert that Marc Anthony wants to harm the cats; while Marc Antony is sleeping, he places Pussyfoot in his mouth and yowls to Filbert to make him think Marc Antony is trying to eat Pussyfoot. Claude's scheme is successful, Filbert is tricked, and Marc Antony is thrown out of the house. Claude indulges in his new life without Marc Antony, taunting the dog by openly abusing Pussyfoot in front of him, dropping Pussyfoot in a vase, and mocking Marc Antony.
Though he remains exiled outside, Marc Antony manages to find ways to beat up Claude, either from behind closed doors and/or by getting into the house in crafty manners. While most of his machinations are short-lived and he is rapidly and violently ejected from the house by Filbert, it usually gives him enough time to clobber Claude again before he gets booted. The multiple thumpings Claude endures over the course of the night eventually elicit the cat's surrender. Marc Antony forces Claude to confess to his crimes and is let back into the house and back to the side of his beloved Pussyfoot. After retrieving Pussyfoot from the vase and placing her back in her bed, a dazed Claude gives Filbert his signed confession. Filbert consequently kicks Claude out of the house, landing him in the street and is promptly run over by a streetcar. Claude sits upright and bemoans "Just one of those days, I guess." before passing out.