A legacy of madness. A mysterious proof. The hope of love. Whip-smart Catherine has sacrificed her education to care for her recently deceased father, Robert, a genius mathematics professor who tragically descended into mental illness. When one of Robert's former students discovers a revolutionary mathematical "proof" in Robert's office, the proceedings become complicated as the effects of an unlikely romance, unsubstantiated claims of the authorship of the proof, and the specter of inherited "madness" create a formula for intense drama in this Pulitzer Prize winning play.