13 is a musical with music and lyrics by Jason Robert Brown and book by Dan Elish and Robert Horn. Following a move from New York City to small-town Indiana, young Evan Goldman grapples with his parents' divorce, prepares for his impending Bar Mitzvah, and navigates the complicated social circles of a new school. 13 is the only Broadway musical ever with a cast and band entirely made of teenagers. It originally began previews on September 16, 2008 and officially opened on October 5, 2008 at the Bernard B. Jacobs Theatre.