In Los Angeles County, a disparate group of twelve - eight men and four women - are chosen to serve on the jury of the trial of Ernest Craig, who is accused of murdering his wife in being in love with another woman, Eileen Marcher, loving Marcher which Craig has readily admitted, but killing his wife of which he has professed his innocence. Each of the twelve feels differently about being a juror - some who are happy to serve, some who don't want to be there - about his or her underlying motivations in being among this specific jury, and admittedly about having a preconceived belief into Craig's guilt or innocence in this high profile case. Who may have the most open mind is Terry Scott, as she is separated from her husband who lives in Cleveland, and thus can understand the different feelings of someone in an unhappy marriage. The interaction between the twelve becomes even more intimate in almost every respect when the jury is ordered sequestered for the duration of the trial. While Bob Fisher is the juror who makes it obvious that he would like to get to know Terry in the biblical sense, it is David Campbell with who she makes the most profound connection. David, too in an unhappy marriage, and Terry end up falling in love in their short time together. Their somewhat secret relationship has an effect on the way they view the evidence and thus the way they argue their perspective to the other ten, but discovery of there even being a relationship may result in misconduct and a mistrial if construed as more than it actually has been.