Secret Society tells the story of Daisy, twenty years old and plump as a dumpling, and her adoring (and unemployed) husband Ken. Struggling financially, Daisy finds a job in a canning factory where she notices that her boss Marlene, radiant and heavy-set, grants special privileges to a group of equally chubby female factory workers. Soon Daisy learns that the women are part of a "secret society" of sumo wrestlers who are gaining strength and self-confidence by learning how to love -- and use -- their large bodies. When Ken discovers his wife has joined the group, Daisy must choose between the life she has always known and the possibility of achieving something extraordinary.