A mathematical proof found in the attic
After the death of her mathematical genius father, Catherine, who gave up her own study of mathematics to tend to him, claims that she is the author of a mathematical proof found in the attic among his unpublished, mostly incoherent notebooks by Hal, one of his former students. But what "proof" does Catherine have that she, and not her father, is the author? Her older sister, home to attend the funeral, doubts her claim and, in fact, doubts Catherine's own sanity. Hal, who has professional ambitions of his own, isn't exactly disinterested and may not be trustworthy; his sleeping with Catherine has also complicated the issue.