With their long necks and matching buns and pink tights, Dara and Marie Durant have been dancers since they can remember. Growing up, they were homeschooled and trained by their glamorous mother, founder of the Durant School of Dance. After their parents' death in a tragic accident nearly a dozen years ago, the sisters began running the school together, along with Charlie, Dara's husband and once their mother's prized student.
 
Marie, warm and soft, teaches the younger students; Dara, with her precision, trains the older ones; and Charlie, sidelined from dancing after years of injuries, rules over the back office. Circling around one another, the three have perfected a dance, six days a week, that keeps the studio thriving. But when a suspicious accident occurs, just at the onset of the school's annual performance of The Nutcracker—a season of competition, anxiety, and exhilaration—an interloper arrives and threatens the sisters' delicate balance.