If a dance is not danced, it vanishes. If the Dancer Dances follows a group of New York City's top modern dancers as they reconstruct an iconic and mysterious work by the legendary Merce Cunningham, revealing what it takes to keep a dance alive. Timed to coincide with Cunningham's centennial, the film confronts one of the most urgent issues facing the dance world today: how do we prevent the loss of masterworks to time?