Diana’s attentive and devoted husband, Homer, has taken her from her hospital bed to a remote experimentaltrauma retreat. After an accident left her with crippling pain and memory loss, this might be their last hope that she’ll get better. Farah, Diana’s personal physician, promises that with the use of Dr. Tréphine’s cutting-edge therapies and with Homer’s helping hand, she will make a full recovery — she’ll feel like her old self again. Homer is enthusiastic about her progress, but the more treatment she undergoes the less Diana feels like herself. When the ritualistic exercises intensify, Diana experiences haunting visions and begins to notice strange changes in her husband’s behaviour. Whispered conversations behind closed doors, going missing for long periods, and his insistence she is recovering even though she feels worse. As troubling memories from her relationship begin to come vividly back to her, Diana must confront the possibility that her recovery may come at a cost far greater than she imagined—one that threatens to unravel a sinister truth about her marriage.