Michael Fassbender’s "brave and courageous" performance, which earned him Best Actor at the Venice Film Festival, is central to the film's impact.

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The film follows Brandon Sullivan ( Michael Fassbender 0;15a8;), a successful New York executive whose life is governed by a compulsive sexual addiction 0;d7d;. His carefully controlled, sterile existence is shattered when his unstable sister, Sissy ( Carey Mulligan 0;7f3;), moves into his apartment. 18;write_to_target_document7;default0;761;18;write_to_target_document1a;_2GftaYLbC-OQseMP1Mfz4AY_20;16; 0;381;0;46a;