In this version of the Lewis Carroll classic, Alice (Charlotte Henry) discovers that an ordinary library mirror is actually a portal into another world. As she adjusts to her constantly changing size, thanks to some mysterious cookies, she follows a rabbit with a pocket watch, stumbles upon a deranged tea party and seeks advice from the shadowy Cheshire Cat (Richard Arlen). Later, Alice runs into Humpty Dumpty (W. C. Fields), whose unfortunate tumble sets even stranger events in motion.