Like generations of little girls, Lauren Kessler fell in love with ballet the first time she saw The Nutcracker, and from that day, at age five, she dreamed of becoming a ballerina. But when she was twelve, her very famous ballet instructor crushed those dreams -- along with her youthful self-assurance -- and she stepped away from the barre. Fast forward four decades. Lauren -- suddenly, powerfully, itchingly restless at midlife --...