Anna Karenina (Keira Knightley), the wife of a Russian imperial minister (Jude Law), creates a high-society scandal by an affair with Count Vronsky (Aaron Taylor-Johnson), a dashing cavalry officer in 19th-century St. Petersburg. Anna's husband, Alexei, offers her a difficult choice: Go into exile with Vronsky but never see her young son again, or remain with her family and abide by the rules of discretion. Meanwhile, a farmer named Levin pines for Princess Kitty, who only has eyes for Vronsky.