Nine is a musical, initially created and written by Maury Yeston as a class-project in Lehman Engel's BMI Music Theatre Workshop in 1973. It was later developed with a book by Mario Fratti, and then again with a book by Arthur Kopit, music and lyrics by Maury Yeston. The story is based also on Federico Fellini's semi-autobiographical film 8½. It focuses on film director Guido Contini, who is dreading his imminent 40th birthday and facing a midlife crisis, which is blocking his creative impulses and entangling him in a web of romantic difficulties in early-1960s Venice.