The popular cartoon cat and mouse are thrown into a feature film. The story has the twosome trying to help an orphan girl who is being berated and exploited by a greedy guardian.
Tom steals an egg from a mother duck's nest, but soon the resultant hatchling runs away from the cat and into a mouse hole, where it finds an able protector in Jerry.
Pluto and Pluto Junior are enjoying a lazy afternoon snooze when the playful pup tangles with a ball, a balloon, a worm, a bird, and a clothesline. Pluto rescues his son from a precarious situation, gets hung up in the process, but manages to land with a splash.
Jerry crashes a vase onto Tom's head, which gets Mammy to throw Tom out. Jerry at first revels in his freedom, but soon tires of this, and, under a flag of truce, hatches a plan with Tom.