“The rules of a period film have been completely broken,” says Keira Knightley in this exclusive video about the new big-screen adaptation of Leo Tolstoy’s 1877 classic, Anna Karenina (due Nov. 9). Knightley, in her third film for director Joe Wright (after 2005’s Pride and Prejudice and 2007’s Atonement) stars in the title role; Jude Law plays her aristocratic husband; and Aaron Taylor-Johnson portrays the cavalry officer with whom she falls into a passionate affair.

What makes this adaptation so unusual is Wright’s decision to set much of the action inside a theater. Watch the video below to understand why (and to swoon over those sets and costumes).

Read more: