Bumper is a young white rabbit who lives in the city, in a crowded pen with lots of other rabbits. The old woman who raises bunnies takes a few downtown every day to try to sell them.
Bumper is sold to Aunt Helen who gives him to Toby, a spoiled nephew. Toby mistreats Bumper, and a little red-headed girl named Edith takes Bumper from Toby to rescue him.
After being put outside in a pen, Bumper manages to escape the pen and his adventures, some not so nice, begin. Eventually, Bumper manages to meet some of his forest cousins, not to return again to the little red-headed girl.