Katherine (Katherine Waterston)'s husband Stephen (Michiel Huisman) committed suicide a year ago. Her husband's death brought Katherine a huge blow. Even though it was a long time ago, Katherine still couldn't completely get out of the shadow. One day, Katherine received a mysterious call, which forced her to return to Brussels, where the truth of Stephen's suicide may be hidden. In Brussels, Katherine met her former friend Emil (Luke Evans), and Katherine was shocked to find that Stephen often visited the nightclub where Emil was. At the same time, Katherine met Edward (Michael Shannon), a man who lived next door to her hotel.