The Woman Outside the Window.

Model, Seong-min, falls in love with Eun-ju who is a hallucinating kleptomaniac suffering from memory blackouts. Seong-min learns that Eun-ju's husband had murdered her fiance long ago and forced Eun-ju to marry him with threats of death. Seong-min becomes determined to rescue her but he may not survive her husband's fury or Eun-ju's own mental state.