An exploration of family dynamics, mental health and our expectations of people we meet. A University of Chicago math professor who wrote some groundbreaking proofs in his career, is dealing with mental illness. The play gives us scenes after the professor's funeral with the older daughter trying to convince her sister that  she should move to New York - so the sister can take care of her. But Catherine wants to stay in Chicago - wants to continue her math studies at Northwestern - and possibly a relationship with one of her father's students.  We also have scenes with the father interacting with Catherine.  Towards the end - Catherine reveals a notebook which contains a brilliant new proof - which she claims she wrote and sister and student believe must have been written by her father. How could 28 yr old Catherine have possibly written this? 
How much like her father is Catherine?
The play was just enough of the dynamics to be engaging - and not too much to become dreary.