The Laughter of God (1991)

Steve and Jane Clemant live a seemingly conent and happy life. They are both successful, professional people with a comfy home and a wide circle of friends. But each one has a secret similiar to the other; a plot to murder. And, that plot is on each other. Jane imagines killing Steve, who is actually more capable of killing Jane, but each of their lovers are connected amongst their many friends and a brilliant plot starts to unfold........