Based on T. Coraghessan Boyle's best-selling novel satirizing late-19th century health fads.

Will and Eleanor Lightbody (Matthew Broderick and Bridget Fonda), guests at cereal mogul Dr. John Harvey Kellogg's (Anthony Hopkins) health spa, are forced to undergo an array of hilariously absurd medical treatments.

Meanwhile, a con artist (John Cusack) and Kellogg's adopted son (Dana Carvey) plot to steal the doctor's coveted corn flake recipe.