Robert, a mathematician with extraordinary gifts and highly-praised reputation, almost goes mad in his later life. His daughter Katherine gives up studies and decides to take care of her father. While looking after him, she becomes depressed and confused. After Roberts passes away, his student Hal appears and then falls in love with Catherine. However, there is a mathematic notebook. Because of it, Catherine is doubted and questioned by others. In facing the gap with her lover and the conflict with her sister, how does she find a solution?
Focus：American playwright David Auburn’s work, Proof, got the Pulitzer Prize and the first prize in the Tony Award in 2001. Before it was adopted for a Hollywood Movie, it had been performed in various languages such as French, Spanish, Korean, Chinese, etc.