Pudgy finds a kitten and Betty Boop is worried because it's behaving so sluggishly. So, she sends Pudgy to the store to buy a box of catnip. On the way home, the box leaks and the kittens mother becomes intoxicated with the herb and follows Pudgy. There the mother and kitten are reunited and leave to go wherever they live. On the way, the box of catnip continues to leak and all the neighborhood cats follow---acting VERY high as a result.
Unfortunately, there isn't a whole lot of plot to this one—and no laughs unless you consider watching drugged cats to be funny. Fortunately, although the film is poor and not especially entertaining, at least the animation quality is high---as it is in all these Fleischer Brothers cartoons. Easy to skip unless you are a die-hard Betty Boop fan.