Young American dancer Susie Bannion arrives in 1970s Berlin to audition for the world-renowned Helena Markos Dance Company. When she vaults to the role of lead dancer, the woman she replaces breaks down and accuses the company's female directors of witchcraft. Meanwhile, an inquisitive psychotherapist and a member of the troupe uncover dark and sinister secrets as they probe the depths of the studio's hidden underground chambers.

Sophie is snatched from her orphanage early one morning by the BFG (Big Friendly Giant), whom she witnesses engaged in mysterious activities. She is soon put at ease, as she learns that BFG's job is to collect, catalog and deliver pleasant dreams to children. She joins him that night, but a mean giants follow them, planning to eat the children of the world.