This is a somewhat self-referentially clever Tom and Jerry cartoon short in that the mouse becomes transparent via invisible ink. Apt for a drawn film. That the mouse has a shadow, however, doesn't make sense in respect to his impenetrability to light, I would think, although I guess it does follow the logic of how one would see invisible ink. And I'll just accept that he returns to visibility by drinking chocolate milk. Otherwise, this brief animated knockabout features the usual cartoon violence and cat-and-mouse chase. The cat employs flour to track the invisible mouse's footsteps at one point, too, which is reminiscent of the tricks the police used in Universal's prior "Invisible Man" series and in the book by H.G. Wells.