The play opens on the eve of the 25th birthday of Catherine, an extremely intelligent but troubled young woman. She is dealing with the recent death of her father, Robert, a brilliant mathematician, who, towards the end of his life began slipping into a state of mental instability. Catherine had been his caretaker during this time and still feels his presence. She must now deal with her estranged sister, Claire, who has come back for the funeral with a view towards “saving” her sister; as well as Hal, a former student of her father, who drops in to review the 103 notebooks left by their father and is, additionally, romantically drawn to Catherine. Throughout all this, Catherine is dealing with her concern about how much of her father’s genius as well as madness she may have inherited. This winner of the 2001 Pulitzer Prize and Tony Award® for Best Play by playwright David Auburn, brings intriguing questions about the fine line between genius and madness, and how one – or possibly both attributes – could be passed along.