Tom subjects Jerry to his usual harassment; but the cat finds a new enemy, and the mouse finds a new friend, in the canary of the house.
Tom is given the task of guarding the fridge during the night by Mammy-Two-Shoes, but as soon as he has started he is tricked by Jerry into falling into the basement, where he lands in a barrel of cider. Now drunk, Tom staggers around in the house getting up to no good with Jerry.
Jasper is given an ultimatum by his master: break one more thing and you're out. Rodent Jerry does his best to make sure that his tormentor "gets the boot".
Mammy Two-Shoes replaces Tom with a younger cat who is a lightning-quick mouser. Tom and Jerry form an alliance in order to get rid of this dangerous newcomer.
Mickey's friends throw him a surprise birthday party at Minnie's house. The chef brings out the cake (with 2 candles); Mickey manages to blow all the cake onto the chef's face, while the candles stay lit. He unwraps his present: a miniature piano. He plays a duet of I Can't Give You Anything But Love, Baby with Minnie, followed by an instrumental version of The Darktown Strutter's Ball, which everyone dances to (including Mickey and Minnie, while the piano stools keep playing). Mickey then plays There's No Place Like Home on the xylophone, then accompanies Minnie on another piece, after which the xylophone gets frisky and eventually dumps Mickey in the fish bowl.
Roscoe and Buster give a bullying Strongman the what-for, but after the performance troupe quits it's up to Fatty and Buster to keep the show going.
The Goddess Venus is jealous of the beautiful human girl Psyche and blames her pet unicorn, Unico, as Psyche's source of good luck that keeps her from the harm of the goddess' cruel intentions. Unico has the amazing power to make anyone he meets happy. Whether it's because of his personality or the powers of his horn, no one knows. Venus has Unico banished, and the West Wind now takes Unico from one place and time to the next. Taken to a heavily polluted city, Unico meets a sickly girl named Chiko who is suffering because of the pollution of a nearby factory that darkens the entire sky. Unico then is determined to cheer her up, cure her, and destroy the nearby factory.
Two gentlemen battle for the "prize". Things escalate quickly...
Mammy Two-Shoes threatens to throw Tom out of the house if he makes a mess. Jerry sees an opportunity to rid himself of his feline nemesis.
Tom's day at the beach doesn't start out well. First he gets his swimsuit caught in the door of the beach house, and doesn't realize it until his intended dive in the ocean sends him snapping back and crashing through the door. He runs out and tries again. This time he is so determined to jump in the water that when he does so, he doesn't notice the tide is out and that he is swimming in the sand, which is filled with broken bottles, tin cans and other debris. Later, he tries to win over a beautiful girl on the beach, but, being the boor he is, he annoys her by drinking her soda pop, eating her hot dog and munching loudly as he lays his head in her lap. Suddenly, a tomato flies through the air and lands on his head. So does a banana peel. Tom looks for the culprit and finds him in the girl's picnic basket. Jerry is inside, eating what he wants and tossing out the rest...
Mammy Two-Shoes tells Tom and Butch that the cat who gets rid of the icebox-raiding, breadbox-invading mouse (Jerry) is the one who can stay.
Tom chases Jerry into a bottle of invisible ink, and the now-invisible Jerry proceeds to have fun torturing Tom.
Jerry takes a midnight snack from the fridge unaware that Tom is watching him.
Tom invites Toots to an elegant dinner. However, he's made the mistake of trying to put Jerry to work, as a serving boy, a corkscrew, and other tasks. Jerry puts up with a little of this, but mostly gets revenge on Tom.
Butch convinces Tom and Jerry that there's no reason to fight and they should all sign a peace treaty. Tom and Butch even rescue their pals from a fellow cat and dog. But then a steak falls off a truck and the boys can't decide how to divvy it up, ultimately losing it completely, and the truce is off.
Tom calls the exterminators, but they send a cat, who despite his various tools, doesn't fare much better than Tom usually does.
The seven short films making up GENIUS PARTY couldn’t be more diverse, linked only by a high standard of quality and inspiration. Atsuko Fukushima’s intro piece is a fantastic abstraction to soak up with the eyes. Masaaki Yuasa, of MIND GAME and CAT SOUP fame, brings his distinctive and deceptively simple graphic style and dream-state logic to the table with “Happy Machine,” his spin on a child’s earliest year. Shinji Kimura’s spookier “Deathtic 4,” meanwhile, seems to tap into the creepier corners of a child’s imagination and open up a toybox full of dark delights. Hideki Futamura’s “Limit Cycle” conjures up a vision of virtual reality, while Yuji Fukuyama’s "Doorbell" and "Baby Blue" by Shinichiro Watanabe use understated realism for very surreal purposes. And Shoji Kawamori, with “Shanghai Dragon,” takes the tropes and conventions of traditional anime out for very fun joyride.
Tom's new book on "how to catch a mouse" doesn't prove too helpful against Jerry; actually, Jerry seems to make better use of it than Tom.
Tom is playing with Jerry when a cute lady cat is delivered to Mammy for her to take care of. Tom is smitten at first sight.
The family dog warns Tom not to make any noise so he can take a nap. Jerry hears this and immediately devises plans to ensure that the dog's nap will be interrupted.