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.