Dance documentary Force of Nature Natalia follows a year in the life of Natalia Osipova, considered to be one of the world's greatest ever ballet dancers.Going backstage at the Royal Opera House, we watch Osipova in the creation and rehearsal of some of her biggest challenges yet.From performing both lead roles on alternate nights in La Bayadere to performing with her partner Jason Kittelberger in an outstanding new contemporary piece, we see the breadth of her abilities.