Tom drowns in a lake and sinks to the bottom. There, he finds a mermouse, which he tries to capture and eat.
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.
It's spring, and Tom is much more interested in the female cat next door than in Jerry.
Tom fights with another cat over Jerry.
Tom is golfing, but having no success. Jerry insures that remains the case.
Jerry runs into a dog pound (and right on top of a napping Spike) to escape a rather mangy-looking Tom. To avoid being ripped to shreds, Tom borrows the head of a nearby dog statue. This easily fools the dogs, but not Jerry, and Tom keeps losing his newfound head...
Spike is guarding a private fishing hole - in his sleep. Tom sneaks in to do some fishing - with Jerry as bait. But one particularly vicious fish turns out to be more than Tom or Jerry bargained for, particularly when he wakes up Spike.
Tom ties up Spike and sneaks into the courtyard of the glamorous Toodles Galore with his bass, hoping to woo her with his song, much to the annoyance of a sleeping Jerry.
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.
Tom is dressed up and treated like a baby by the little girl of the house.
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...
Tom and Jerry are in a bowling alley. Both spend a lot of time sliding on the well-polished lanes. Eventually, Jerry takes up residence among the pins and Tom tries to bowl him down.
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.
Jerry is awakened from a nightmare by a knock on the door: someone has left a foundling in a walnut shell with a note, giving his name as Nibbles and saying he needs lots of milk. Fortunately, there's a dish handy, but it's next to Tom. Nibbles scurries out and dives off Tom's nose, then grabs a whisker for balance, waking Tom up. Jerry grabs him just in time and they hide under the milk. Tom laps up some milk and gets Nibbles; Jerry rescues him, and they run for the hole. Next, they try a very long straw; Tom catches them and sucks Nibbles through the straw. Much chasing follows, with a pause now and then for some milk. Tom traps Jerry in a milk bottle and chases Nibbles a while; he finally corners Nibbles and spanks him with a flyswatter. Jerry is so enraged he burst out of the milk bottle and lets out a ferocious roar; he grabs Tom by the tail and thoroughly pummels him, then stands over him as Tom feeds Nibbles milk.