When Marian is on the run, she goes to the only place she knows is safe: her childhood home. She is greeted by her estranged sister, Vivian, a stay-at-home housewife struggling to conceive and on the verge of a failing marriage. Though the two are identical twins, they live opposite lives. Marian's mysterious return disrupts Vivian's small-town routine, and the sisters must learn to reconnect and reconcile. When Marian's haunting past finally catches up to her, their separate worlds collide, catapulting both sisters into grave danger.