Another reviewer has provided an excellent description of the plot, so I'll focus on providing a little more information about the two mouse characters.
As others noted in their reviews, the two lead characters in this cartoon look a lot like Mickey Mouse and Minnie Mouse, but they're not. Their names are actually Milton and Rita Mouse. They appeared in a number of Van Beuren cartoons. The resemblance, however, is so strong that Walt Disney sued Van Beuren Studios, and in a 1932 court settlement Van Beuren agreed to discontinue using Milton and Rita as characters.
As others noted in their reviews, the two lead characters in this cartoon look a lot like Mickey Mouse and Minnie Mouse, but they're not. Their names are actually Milton and Rita Mouse. They appeared in a number of Van Beuren cartoons. The resemblance, however, is so strong that Walt Disney sued Van Beuren Studios, and in a 1932 court settlement Van Beuren agreed to discontinue using Milton and Rita as characters.