All of a Sudden (1996)
Director Herman Yau mixes the murder and mayhem plotted out in the pages of the clever, well written script with enough sex and violence to keep fan's of his twisted body of work happy.
Simon Yam plays a grieving husband who develops a relationship with Irene Wan, who has an unfaithful husband. Their strange love affair blossoms through a suicide, an attempted murder, and a kidnapping; that's just the first act of the film! Believe me, it gets more bizarre from there.
While Ms. Wan generously displays her finer points, the real star of this film is Dayo Wong. His quirky performance as the offbeat, off center, slightly kooky police detective investigating all these crimes is wonderful.