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 with her, the separate worlds of both sisters collide, putting them in great danger.